Level V/60 Basic Heredity Science Teacher’s Guide Skills & Strategies Anchor Comprehension Strategies • Evaluate author's purpose Comprehension • Ask questions • Identify cause and effect • Use text features to locate information Word Study/Vocabulary • Use context clues to determine word meaning Science Big Idea • Genetic information is passed from generation to generation by DNA, which controls the traits of an organism. Theme: The Human Body • Basic Heredity • Genetic Disorders • Advances in Genetics B e n c h m a r k E d u c a t i o n C o m p a n y Core Lesson Planning Guide This five-day lesson plan shows one way to use the chapter book for explicit strategy instruction. Activities D ay 1 Page 3: Prepare to Read • Build Content Background • Introduce the Book Pages 4–6: Model Strategies: Introduction–Chapter 1 2 3 4 5 • Monitor-Reading Strategy: Ask Questions • Comprehension Strategy: Evaluate Author’s Purpose and Point of View • Use Context Clues to Determine Word Meaning: Direct Definitions Pages 7–8: Guide Strategies: Chapter 2 • Monitor-Reading Strategy: Ask Questions • Comprehension Strategy: Evaluate Author’s Purpose and Point of View • Use Context Clues to Determine Word Meaning: Direct Definitions Pages 9–10: Apply Strategies: Chapter 3–Conclusion • Monitor-Reading Strategy: Ask Questions • Comprehension Strategy: Evaluate Author’s Purpose and Point of View • Use Text Features to Locate Information: Captions Page 11: Synthesize Information • Administer Ongoing Comprehension Assessment • Evaluate Cause-and-Effect Relationships Using Navigators Chapter Books Explicit Strategy Instruction Use the complete guide to model, guide, and support students as they apply comprehension and word-study strategies. Use portions of the guide to scaffold reading instruction for students who do not need modeled instruction. 2 Small-Group Discussions Independent Reading Introduce the book and model strategies. Have the group set a purpose for reading based on the introduction. Students read the book, or parts of the book, independently. Then have them use the Small-Group Discussion Guide as they discuss the book together. Have students select titles at their independent reading levels. After reading, have students respond to the text in reader response journals or notebooks. Copyright © 2011 Benchmark Education Company, LLC. All rights reserved. Teachers may photocopy the reproducible pages for classroom use. No other part of the guide may be reproduced or transmitted in whole or in part in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage or retrieval system, without permission in writing from the publisher. ISBN: 978-1-4108-6286-0 Prepare to Read E nglish L anguage Learners Build Content Background •Ask students if they know what heredity is. Explain that heredity is the study of how genes and traits are passed from one generation to the next, from parents to children. •Make a three-column chart. Leave the headings blank. Ask students to name traits (physical features, characteristics, or abilities) that they have gotten or could have gotten from their parents or grandparents. Prompt their thinking by offering your own ideas such as having the same shape nose as your grandmother or being allergic to insect bites like your dad. •Write students’ ideas that are related to physical appearance in the first column of the chart, those related to personality in the second column, and those related to health in the third. •Have students look at the entries in the first column of the chart. Ask: What do all these traits have in common? (They are related to how a person looks.) Help students classify the traits in the second column as being related to how a person acts and the traits in the third column as being related to how a person feels. •Ask students to think of headings for the three columns. Appearance Personality Health Show pictures of people who are members of the same family. (You might use your own family if members share noticeable traits.) Ask students what features these family members have in common. (Examples: straight or curly hair, brown or blue eyes, shape of chin) Discuss with students where these traits come from. Write the words heredity, genetics, genes, and DNA on the board. Ask students to share what they know about these words. Then have volunteers look up the words in the glossary and read aloud their meanings. Encourage students to keep their own lists of words and definitions. Suggest that they add visual aids whenever possible to help them remember the meanings of these words. For examples, for dominant and recessive, they might draw a large bold face and a small shy face. Informal Assessment Tips (Possible answers: Appearance, Personality, Health) 1. Assess students’ ability to skim for interesting pictures and to offer reasonable explanations for their choices. Introduce the Book 2. Document informal observations in a folder or notebook. color of eyes color of hair sense of humor quick temper asthma nearsightedness •Give students a copy of the book. •Have them read the title and skim the table of contents. Ask: Which chapter would you turn to if you wanted to know why you have brown hair? Why would you turn to that chapter? (Chapter 2; its title indicates that it will explain how people get their physical characteristics.) •Assign a chapter to pairs of students. Ask the partners to look at the pictures in their chapter, choose a picture they think is interesting, and explain to the group why they think that. •To introduce Key Words and Text/Graphic Features found in this book, use the book’s inside front cover. © 2011 Benchmark Education Company, LLC 3. Keep the folder or notebook at the small-group reading table for handy reference. Meeting Individual Needs For students who struggle with skimming for pictures, choose a chapter and model looking at the pictures and making observations about them. Explain why you think one picture is more interesting than the others. 3 Model Strategies: Introduction–Chapter 1 ABOUT THE STRATEGY Ask Questions What? Readers ask questions about unknown words, why something happens, how it happened, and what might happen next. Some questions have answers stated in the text, some answers are implied in the text, and some answers need further research. Still other questions have no answers. Why? Asking questions keeps read- ers involved with the text and helps them understand and remember what they read. When? Good readers ask questions before reading to help set a purpose. They ask questions during reading to monitor and clarify their understanding. They ask questions after reading to help them analyze and synthesize what they have read. How? Good readers pause and wonder about the text. They keep track of their questions in a journal or on selfstick notes. They try to answer questions during and after reading. Before Reading Monitor-Reading Strategy: Ask Questions •Say: Good readers ask questions as they read. This keeps them focused on their reading and helps them understand and remember what they read. One thing they might ask a question about is any unfamiliar word they come across as they read. •Use a real-life example of asking questions while you read. Say: When I come across an unfamiliar word, I stop and ask myself what the word means. Sometimes unfamiliar words are boldfaced, shown in dark print. Sometimes the author defines the word right in the text, but other times I have to look for clues that can help me figure out the meaning of the word. •Say: Yesterday we previewed the book Basic Heredity. Today we are going to ask questions about unknown words in the Introduction and Chapter 1. •Read pages 2–3 aloud while students follow along silently. Say: The boldfaced words are unfamiliar, but they are defined both in the text and in the glossary, so now I know what they mean. However, on page 3, the text says that someday scientists could cure diseases caused by faulty genes. I’m not sure about the meaning of faulty, and it’s not directly defined in the text, but I think it must mean “wrong or defective” if those kinds of genes cause diseases. What do you think? •Have students provide examples of any other unknown words in the Introduction. Tell them to write the words on self-stick notes and put the notes in their book. During Reading Set a Purpose for Reading •Ask students to read pages 5–11 silently. Have them ask questions about the unknown words they find and write their questions on self-stick notes or in their journals. Remind them to look for context clues to help them understand the meaning of each unknown word. 4 © 2011 Benchmark Education Company, LLC After Reading Discuss the Reading •Ask students to share their unknown words from the Introduction and Chapter 1. Remind them that some unknown words have definitions right in the text while the meanings of other words can be figured out using context clues. Say: The word complex in the last paragraph on page 5 is unknown to me, but I can use context clues to figure out its meaning. The sentences in that paragraph tell me that complex means “having many parts.” •Have students explain how they determined the meanings of other unknown words. Ask: Who wrote a question about the boldfaced word genome in the second column on page 5? How did you find the meaning of that word? (Genome is defined in the text as “the sum total of DNA in a living thing.”) •Tell students to look for unfamiliar words as they read each chapter. Remind them to write their questions on self-stick notes or in their journals. •Have students read the checkpoint on page 7. Explain that talking about what we read is one way to understand and remember the information. Have students talk about the prompt. •For text-dependent comprehension practice, ask the questions for the Introduction and Chapter 1 found on the Comprehension Through Deductive Reasoning Card for this chapter book. I nformal Assessment Tips 1. Watch students as they write questions on self-stick notes or in their journals. 2. In a folder or notebook, jot down what you see each student doing. 3. Students should be asking questions about unknown words as they read. Document students who are and who are not using this monitorreading strategy. Meeting Individual Needs For students who struggle with this activity, model the strategy again and remind them that asking questions about unknown words as they read will help them better understand the material. Rapid readers can use context clues, the glossary, or a dictionary to find the meanings of words they don’t know. Have them write the words and their definitions in their journals. Comprehension Strategy: Evaluate Author’s Purpose and Point of View •Say: When authors write, they have a reason, or purpose, for writing. When I read, I look for clues to the author’s purpose. If the author tries to convince me to agree with something, he or she is writing to persuade. If the author gives information, he or she is writing to inform. If the author tells a story, he or she is writing to entertain. Recognizing the author’s purpose for writing helps me better understand what I’m reading. •Pass out the graphic organizer “Evaluate Author’s Purpose and Point of View” (blackline master, page 14). You may want to make a chart-size copy of the graphic organizer or use a transparency. •Explain that as students read, they will complete the first four rows together. They will complete the last two rows in pairs or independently. © 2011 Benchmark Education Company, LLC 5 Introduction–Chapter 1 (continued) Page 6 Author’s Purpose to inform 10–11 to inform Evidence Author gives information about genes: made of long stretches of DNA; responsible for traits; tell cells how to make proteins. Author gives information about kinds of traits: physical traits (feet size, hair color), behavioral traits (sense of humor, quick temper), increased chances of getting some diseases. Reader Response What is the difference between mitosis and meiosis? What can you do to help you remember these processes? Write a response in your journal and share your thoughts with a group member. 6 Comprehension Strategy: Evaluate Author’s Purpose and Point of View (cont.) •Have students return to Chapter 1 and follow along as you model how to evaluate the author’s purpose and point of view. Write the information on the graphic organizer as you find it. Read page 6 aloud and say: On this page, the author tells us about genes. He says that genes are made of long stretches of DNA. He explains that genes are responsible for traits and that genes tell cells how to make proteins. I’ll write these facts in the Evidence column. The author isn’t writing to entertain or to persuade. He is writing to inform. I’ll write that in the Author’s Purpose column. •Read pages 10–11 aloud and say: The author tells about the kinds of traits people can inherit and gives examples of each kind. I’ll write these facts in the Evidence column. If an author gives information, what is the author’s purpose for writing? He is writing to inform. I’ll write to inform in the Author’s Purpose column. •Say: We’ll continue evaluating the author’s purpose and point of view as we read the rest of the book. Use Context Clues to Determine Word Meaning: Direct Definitions •Read aloud the fourth sentence of the second paragraph on page 4. Explain that the author gives a direct definition to help the reader understand the meaning of the word bases. Say: Look at the sentence that contains the word bases. The next sentence begins with A base is. These words tell me that the rest of the sentence will define the word base. After reading this sentence, I see that the meaning of base is “a special chemical.” •Call students’ attention to the word traits in the second sentence on page 10. Say: This sentence ends with the word traits. The next sentence begins with A trait is. These words tells me that the rest of the sentence will define the word trait. After reading the sentence, I see that the meaning of trait is “a special quality or feature.” •Tell students that they will continue to use context clues to determine the meanings of unknown words as they read Basic Heredity. Finding and learning the definitions of these words will help them understand the other new information in the book. © 2011 Benchmark Education Company, LLC Guide Strategies: Chapter 2 Before Reading Monitor-Reading Strategy: Ask Questions •Have students look at their journals to review questions they wrote yesterday.Ask them if the Introduction and Chapter 1 answered any of their questions about unknown words, and discuss their responses. Remind students that asking questions is what good readers do to understand and remember what they have read. •Say: Today we are going to ask the questions who, what, why, and how. Read pages 12–13 while students follow along. Ask the following questions as you read: How do genes determine whether you are male or female? What other symptoms or side effects might Maria Patino and other people like her have because of their genetic mutation? •Point out that the first question is answered in the book while the second question is not. Ask: How can I answer my second question? (Possible answers: Ask an expert. Research using reference books or the Internet.) •Have students write who, what, why, and how questions on self-stick notes or in their journals as they read pages 14–15. During Reading Set a Purpose for Reading •Have students finish reading Chapter 2. As they read, they should ask who, what, why, and how questions. For example, they might ask how chromosomes affect the way traits are passed down to children from their parents. E nglish L anguage Learners Carefully watch ELL students as they complete the assignment. If they are not writing questions, it may be because they do not understand the text. If they are writing questions, make sure the questions apply to the text. Meeting Individual Needs For students who struggle with this strategy, model it again. Have them read one page at a time and ask one question per page. Ask them if the question is answered in the text or not. If not, ask them where they might find the answer to the question. Rapid readers can review their questions. With a partner, they can choose one question and use research materials to find an answer. Then they can share their answer with others. After Reading Discuss the Reading •Have students share their questions and talk about why they asked particular questions. Help them identify questions that are answered in the text and questions that need additional research. Spend a few minutes on questions that are not answered in the text. •Say: The title of Chapter 2 is “Why Do You Look Like You Do?” How does the text in the chapter answer this question? •For text-dependent comprehension practice, ask the questions for Chapter 2 found on the Comprehension Through Deductive Reasoning Card for this chapter book. © 2011 Benchmark Education Company, LLC 7 Chapter 2 (continued) Page Author’s Purpose Evidence to inform Author gives information about genotypes and phenotypes: genotype is actual genetic makeup of organism; phenotype is physical traits of certain thing; people share 99.9% of same genetic material. 18–19 to inform Author gives information about Mendel’s laws of heredity: Mendel studied pea plants to find out about forms of genes and how genes affect physical traits, such as height and color. 16 Reader Response A child has one parent with brown eyes and one parent with green eyes. Which is the child more likely to have: brown eyes or green eyes? Why? Write a response in your journal and share your thoughts with a group member. Comprehension Strategy: Evaluate Author’s Purpose and Point of View •Review the “Evaluate Author’s Purpose and Point of View” graphic organizer, and remind students that by looking for clues, or evidence, they can evaluate an author’s purpose and point of view. •Have students reread page 16 to find the author’s purpose and evidence for that purpose. Write both on the graphic organizer. •Follow the same procedure for pages 18–19. Provide support for students who are struggling with this strategy. •Use the completed graphic organizer on this page for suggested answers. Although their wording may vary, make sure that students have included the facts shown. Use Context Clues to Determine Word Meaning: Direct Definitions •Remind students that sometimes they can figure out the meanings of unfamiliar words by reading other nearby words or sentences. •Have students locate the word mutation in the third paragraph on page 12. Say: This word is in boldfaced type, so I could find its meaning in the glossary. However, the next sentence begins with A mutation is. These words signal that this sentence will give the meaning of mutation. After reading the sentence, I know that a mutation is a change in a gene. •Ask students to find the term sex-linked trait in the last sentence of the second paragraph on page 14. Say: Here, the definition of the term sex-linked trait comes before the term. It is signaled by the words is called a that appear just before sex-linked trait. By going back to the beginning of that sentence, I find out that the meaning of sex-linked trait is “a gene found only on the X chromosome.” •For additional practice, have students complete the blackline master on page 16. 1. forensic science the use of scientific ideas and tools to solve crimes 2. contours outlines used to classify fingerprints 3. whorls lines that circle around a central point 4. dactyloscopy the method of obtaining fingerprints 5. impressionthe pattern that is made when a hard object is pressed onto a softer material 8 © 2011 Benchmark Education Company, LLC Apply Strategies: Chapter 3–Conclusion Before Reading Monitor-Reading Strategy: Ask Questions •Remind students that they have practiced asking questions about unknown words and about who, what, why, and how. Have them review the questions they have already asked and written on self-stick notes or in their journals. Tell them to continue asking who, what, why, and how questions as they read. •Read pages 22–23 aloud while students follow along. Say: My question is, “What diseases run in families?” This question is not answered in the text. What can I do? Have students offer possible ways to answer the question. Teaching Tips After discussing the reading, have students remove the self-stick notes from their books and place them in their journals on a page titled “Ask Questions.” Use this page to review asking questions throughout the year. During Reading Set a Purpose for Reading •Have students read the rest of the book silently. Encourage them to ask who, what, why, and how questions as they read. Have them write their questions on self-stick notes or in their journals. After Reading •Have students share the questions they have asked while reading. •Ask: Which questions were you able to answer from the book? Which questions need additional research? How can you find answers to these questions? •Have students read the checkpoint on page 28. Explain that reading more about a topic can help them answer questions that may have come up as they read the text. Have pairs of students work on the prompt together. •For text-dependent comprehension practice, ask the questions for Chapter 3 and the Conclusion found on the Comprehension Through Deductive Reasoning Card for this chapter book. © 2011 Benchmark Education Company, LLC 9 Chapter 3–Conclusion (continued) Comprehension Strategy: Evaluate Author’s Purpose and Point of View Page Author’s Purpose Evidence to inform Author gives information about role of genes in health: people may have genetic disorders; certain diseases can run in families. 26–27 to inform Author gives information about genes and role in behavior: exact role unknown, but twins raised in different environments often share common traits. 23 •Review the graphic organizer that students have been completing. Explain that they will evaluate the author’s purpose and point of view in Chapter 3 in pairs or independently. Students should reread page 23 and 26–27 and write both the evidence and the author’s purpose for those pages. •Ask if students have any questions before they begin. Monitor their work and intervene if they are having difficulty. Discuss students’ responses together. •For more practice with evaluating author’s purpose and point of view, have students complete the blackline master “Evaluate Author’s Purpose and Point of View” on page 15. Passage Informal Assessment Tips 1. Watch students as they evaluate author’s purpose and point of view. Ask yourself: How have students progressed with this strategy? What problems are they still having? 2.Watch students as they complete the graphic organizer. Ask yourself: Who is still struggling with this strategy? How can I help them? 3. Jot down your thoughts in your folder or notebook. For students who struggle with evaluating author’s purpose, review the strategy using the Comprehension Strategy Poster: Evaluate Author’s Purpose and Point of View. Reader Response Which do you think plays a bigger part in shaping someone’s personality: genes or environment? Why? Write a response in your journal and share your thoughts with a group member. 10 Author’s Purpose Evidence 1 to persuade Author argues that despite genetics, reader can try to prevent diseases, such as skin cancer; tells actions to do; speaks directly to reader (you); uses persuasive words (should, everyone, most importantly). 2 to entertain Author includes characters (Aaron, Dad, Mom), plot (Aaron and Dad visit Mom in the hospital to see new babies) in which events are told in order, and dialogue, all of which are elements of a story. Use Text Features to Locate Information: Captions •Ask students to tell what a caption is. (a sentence placed near a picture that tells about the picture) Explain that in addition to telling about a picture, a caption often gives information that is not in the main text. •Have students skim Chapter 3 to find and read the captions. Ask: What information is provided in the caption under the picture on page 23? (People with albinism cannot adapt to bright sun. The sun could injure them.) Does this information add to what is told about albinism in the main text on this page? If so, how? (Yes; the main text gives information about what albinism is, while the caption adds information about how albinism affects the person who has it.) •Have students find and discuss other captions in Chapter 3. For each caption, ask these two questions: What does the caption tell us? How does this information support or add to the information in the main text? © 2011 Benchmark Education Company, LLC Synthesize Information Administer Ongoing Comprehension Assessment •Have students take Ongoing Assessment #13 on pages 62–63 in the Comprehension Strategy Assessment Handbook (Grade 6). Evaluate Cause-and-Effect Relationships •Point out to students that the book Basic Heredity tells about many causes and effects. For example, it tells about the effects of genes on inherited traits. It also tells about the effects of mitosis and meiosis on heredity. •Ask students to skim Chapter 2 looking for causes and effects. Have them write down the causes and effects they find on a chart like the one below. •When they have completed their charts, have students discuss the information they recorded. Give them the opportunity to share their causes and effects. •To check students’ grasp of the concept, have volunteers read aloud effects from their charts and ask the rest of the group to give the cause. Let the volunteers tell whether the responses are correct or not. Cause © 2011 Benchmark Education Company, LLC 1. Score assessments and determine if more instruction is needed for this strategy. 2. Keep group assessments in a smallgroup reading folder. 3. Look closely at students’ responses. Ask yourself: Why might this student have answered the question in this manner? For in-depth analysis, discuss responses with individual students. 4. If needed, reteach this strategy and administer the second Ongoing Assessment #14 on pages 64–65 in the Comprehension Strategy Assessment Handbook (Grade 6). 5. Use ongoing assessments to document growth over time, for parent/ teacher conferences, or for your own records. Effect A child inherits an X chromosome The child will be a female. from its mother and an X chromosome from its father. Identical twins—two babies with A fertilized egg cell divides. the same genetic information—form. A child has two parents with brown eyes. I nformal Assessment Tips The child will most likely have brown eyes too. E nglish L anguage Learners Make sure students understand the meanings of cause and effect by discussing a few simple examples. For example, the effect of sleeping late might be caused by a broken alarm clock. Help students complete the chart by discussing each row individually. Ask them to read aloud the first cause on the chart. Help them find the part of the text that discusses this topic. Invite them to reread that section aloud. Then have them suggest how they would summarize the information for the chart. 11 Reading/Writing Connections Write a Personal Response Teaching Tips Transfer personal response prompts to a piece of large chart paper and hang it in the room. Students can refer to the list throughout the year. Scoring Rubric 4 The prompt is well developed. There is strong evidence of focus, organization, voice, and correct conventions. 3 The prompt is developed. There is adequate evidence of focus, organization, voice, and correct conventions. 2 The prompt is somewhat developed. There is minimal evidence of focus, organization, voice, and correct conventions. 1 The prompt is weakly developed. There is little evidence of focus, organization, voice, and correct conventions. Invite students to respond to the book in a way that is meaningful to them. The prompts below provide a variety of alternatives. •Compare this book about heredity to other books, articles, or stories you have read about heredity and genetics. (text-to-text) •Why do you think it is important for people everywhere to understand basic heredity and genetics? (text-to-world) •What did you think about while reading this book? (make connections) •Did any part of this book confuse you? What was confusing? How could it have been clearer? (self-monitor) •Which of your traits do you think came from heredity? Which do you think came from environment? (personal response) •Would you recommend this book to a friend? Why or why not? (evaluate) •Which parts of this book did you think were well-written? Which parts seemed less well-written? Why? (evaluate) •What important ideas were discussed in this book that you think you should remember? (synthesize information) Write to a Text Prompt Use the prompt below as a timed writing activity. Students have a maximum of one hour to draft, revise, and edit a response. Use the rubric provided in the sidebar to score students’ writing. Why are you a human being and not a pea plant? How are you and pea plants similar in terms of genetics and heredity? Use information from the book to support your answer. Write to a Picture Prompt Use the following picture prompt to develop students’ visual writing abilities. Look at the picture on page 2. How do these people look alike and different? Why? Write a response in your journal and share your thoughts with a group member. Use details from the picture to support your answer. 12 © 2011 Benchmark Education Company, LLC Name _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Small-Group Discussion Guide Directions: Use this sheet to talk about the book. Word Study: Write words you did not know. Discuss the meanings with your group. Use the text to clarify the meanings. Date____________ Rules for a Good Discussion: 1. Be prepared. 2. P ay attention to the person who is talking and do not interrupt him or her. 3. T hink about what others are saying so you can respond. 4. Use inside voices. 5. L et everyone in the group have a turn to speak. 6. B e respectful of everyone’s ideas. Questions: Write two or three questions you had while reading this book. Discuss the questions and answers. Adapted from Guiding Readers and Writers (Grades 3–6):Teaching Comprehension, Genre, and Content Literacy, Irene C. Fountas and Gay Su Pinnell (Portsmouth, NH: Heinemann Publishing Co., 2001). Ways to Make Connections Make Connections: Write three connections you made with the text. Discuss them with your group. Adapted from Literature Circles: Voice and Choice in the Student-Centered Classroom, Harvey Daniels (Portland, ME: Stenhouse Publishers, 1994). © 2011 Benchmark Education Company, LLC Text-to-Self: This reminds me of a time when I . . . Text-to-World: What’s going on in this book is like what’s happening right now in . . . Text-to-Text: This book reminds me of another book I read called . . . . It was about . . . Name__________________________________________ Date____________________ Evaluate Author’s Purpose and Point of View Page Author’s Purpose Evidence 6 10–11 16 18–19 23 26–27 © 2011 Benchmark Education Company, LLC Name__________________________________________ Date____________________ Evaluate Author’s Purpose and Point of View Directions: Read the passages. Write the author’s purpose in the second column and the evidence in the third column. Fighting Genetics Scientists aren’t exactly sure why, but some diseases, such as cancer, run in families. Does that mean that if someone in your family has cancer, you will get it? Not necessarily. You should still take steps to prevent the disease. For example, everyone can do something to help prevent skin cancer. Avoid the sun, especially between 11 a.m. and 3 p.m. When you are in the sun, wear a hat and a sunblock with an SPF of at least 30. Most importantly, check your skin regularly and tell your doctor if you see anything unusual. You can’t change your genetics, but following these simple rules will help keep you and your precious skin healthy. Surprise Aaron wasn’t sure if he should be worried. He knew things would change. Still, he was excited by the idea of having someone to play with. However, that would take a while. After all, a newborn baby can’t play baseball! As Aaron and his father walked into his mother’s hospital room, Aaron noticed a strange grin on Dad’s face. Maybe he had mixed feelings, too. Aaron smiled. “So, Mom, can I see my baby brother?” “Actually, Aaron, this is your baby sister.” Aaron tried not to look disappointed. Then his mother added, “The nurse is holding your baby brother!” Twins! Mom and Dad had known all along, but it was a surprise to Aaron. Passage Author’s Purpose 1 2 © 2011 Benchmark Education Company, LLC Evidence Name__________________________________________ Date___________________ Use Context Clues to Determine Word Meaning: Direct Definitions Directions: Read the passage. Look for direct definitions of the boldfaced words. Fingerprints No two people in the world have the same fingerprints. Even identical twins, who share the same DNA, have different fingerprints. That’s why fingerprints are so important in forensic science. Forensic science is the use of scientific ideas and tools to solve crimes. Fingerprints are classified by their shapes and outlines. These outlines are called contours. Fingerprints are also classified by ridges and whorls. Whorls are lines that circle around a central point. The Federal Bureau of Investigation (FBI) uses eight different patterns to classify fingerprints. The method of obtaining fingerprints is called dactyloscopy. It involves cleaning and drying the fingers and then rolling the tip of each finger over a glass surface coated with printer’s ink to create a light gray impression. An impression is the pattern that is made when a harder object is pressed onto a softer material. The FBI and other law-enforcement agencies have millions of sets of fingerprints on file. These fingerprints have been used to solve many crimes. Directions: Write the definitions of the boldfaced words. Use the passage to help you. 1. forensic science _____________________________________________ __________________________________________________________ 2. contours _____________________________________________ __________________________________________________________ 3. whorls _____________________________________________ __________________________________________________________ 4. dactyloscopy _____________________________________________ __________________________________________________________ 5. impression _____________________________________________ __________________________________________________________ © 2011 Benchmark Education Company, LLC
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