Biology Unit 1 Review Match the following definitions with words below. There can only be 1 correct word per definition 1.
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type of data that uses specific numbers or amounts comes after a hypothesis and is used to determine whether the hypothesis is correct the study of life a signal to which an organism responds information gathered through observations organized way of using evidence to learn about the natural world; scientific ____ a proposed scientific explanation that can be tested the ability of organisms to change over time variable that changes during an experiment the maintaining of constant internal conditions or balance ______ Homeostasis _______ Quantitative ______ Biology ______ Independent ______ Dependent _______ Reasoning ______ Experiment ______ Evolution ______ Hypothesis _______ Qualitative ______ Stimulus ______ Method ______ Theory _______ Control ______ Constant ______ Experiment List the characteristics of life and provide an example of each Review textbook and notes for examples Read the following scenario and answer the questions After studying about recycling, members of the RY biology class investigated the effect of various recycled products on plant growth. John’s lab group compared the effect of different aged grass compost on bean plants. Because decomposition is necessary for release of nutrients, the group hypothesized that older grass compost would produce taller bean plants. Three flats of bean plants (25 plants/flat) were grown for 5 days. The plants were then fertilized as follows: a) Flat A: 450g of 3 –month old compost, b) Flat B: 450g of 6-­‐month-­‐old compost, and c) Flat C: 0g compost. The plants received the same amount of sunlight and water each day. At the end of 30days the group recorded the height of the plants (cm). Identify the hypothesis from the scenario: Older compost gives rise to more plants Identify the Independent Variable (I.V): Age of compost Identify the Dependent Variable (D.V): Height Qualitative Measurements: Visual observation of the height of plants Quantitative Measurements: Actual measurements of height of plants Identify the Control: No treatment plant (compost) Identify the Constants: Sunlight and water Aloe vera and Planaria Jackie read that Aloe vera promoted healing of burned tissue. She decided to investigate the effect of varying amounts of Aloe vera on the regeneration of the worm planaria. Using a sterile scalpel she cut the planaria in half to obtain 10 parts (5 heads and 5 tails) for each experimental group. She applied concentrations of 0%, 10%, 20% and 30% Aloe vera to each groups. Fifteen milliliters of the Aloe vera solution were applied. All planaria were maintained in a growth chamber with identical food, temperature, and humidity. On Days 5, 10 and 15, Jackie observed the regeneration of the planaria parts and categorized development as full, partial or none. Identify the hypothesis from the scenario: Aloe vera increases regeneration of planaria Identify the Independent Variable (I.V): Amount of aloe vera Identify the Dependent Variable (D.V): Regeneration of planaria Qualitative Measurements: Visual observation of planarias’ regeneration Quantitative Measurements: The number of planaria either regenerated fully, partially or none Identify the Control: No aloe vera Identify the Constants: Same temperature, humidity and food Susie wondered if the height of a hole punched in the side of quart-­‐size milk carton would affect how far from the container a liquid would spurt when the carton was full of liquid. She used 4 identical cartons and punched the same size hold in each. The hole was placed at a different height on one side of each of the containers. The height of the holes varied in increments of 5 cm, ranging from 5 cm to 20 cm from the base of the carton. She put her finger over the holes and filled the cartons to a height of 25cm with a liquid. When each carton was filled to the proper level, she placed the carton in the sink and removed her finger. Sushi measured how far away from the carton’s base the liquid had squirted when it hit the bottom of the sink. Each carton was identical, and the liquid was water for each trial. Identify the hypothesis from the scenario: The higher the height, the farther the squirt Identify the Independent Variable (I.V): The height Identify the Dependent Variable (D.V): The distance the water squirted Qualitative Measurements: Visual observation of the distance Quantitative Measurements: The actual measured distance Identify the Control: None or the lowest one Identify the Constants: Same carton, liquid, and hole size Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks. Identify the hypothesis from the scenario: More special juice, the more industrious the workers Identify the Independent Variable (I.V): The amount of juice Identify the Dependent Variable (D.V): The amount of stacks of papers Qualitative Measurements: The observation of the stacks of papers Quantitative Measurements: The actual counted number of papers Identify the Control: Group without the juice Identify the Constants: The type of work, the type spent working, the environment Homer notices that his shower is covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to check this this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower. Identify the hypothesis from the scenario: The use of coconut juice will eliminate green slime Identify the Independent Variable (I.V): The amount of coconut juice Identify the Dependent Variable (D.V): The amount of slime Qualitative Measurements: The amount of slime based on observation Quantitative Measurements: The mass of the slime, the area of the slime or anything that you can measure Identify the Control: Without the coconut treatment Identify the Constants: Same shower, same light, same length of exposure Bart believes that mice exposed to radiowaves will become extra strong (maybe he's been reading too much Radioactive Man). He decides to perform this experiment by placing 10 mice near a radio for 5 hours. He compared these 10 mice to another 10 mice that had not been exposed. His test consisted of a heavy block of wood that blocked the mouse food. he found that 8 out of 10 of the radiowaved mice were able to push the block away. 7 out of 10 of the other mice were able to do the same. Identify the hypothesis from the scenario: Radiowaves will give extra strong mice Identify the Independent Variable (I.V): The length of time of radiowave exposure Identify the Dependent Variable (D.V): The movement of the wood Qualitative Measurements: Moving of the wood Quantitative Measurements: The number of times the wood can be moved away or the number of mice that moved the wood away Identify the Control: Without the radiowave treatment Identify the Constants: Same weight of wood, same type of food, same environment Krusty was told that a certain itching powder was the newest best thing on the market, it even claims to cause 50% longer lasting itches. Interested in this product, he buys the itching powder and compares it to his usual product. One test subject (A) is sprinkled with the original itching powder, and another test subject (B) was sprinkled with the Experimental itching powder. Subject A reported having itches for 30 minutes. Subject B reported to have itches for 45 minutes Identify the hypothesis from the scenario: Itching powder will cause more itch than original Identify the Independent Variable (I.V): The amount of itching powder used Identify the Dependent Variable (D.V): The itchiness Qualitative Measurements: Did it itch? Itchier than original? Quantitative Measurements: How long did the itch actually last? Identify the Control: The original powder Identify the Constants: The location of exposure, the time it was sprinkled, etc… Lisa is working on a science project. Her task is to answer the question: "Does Rogooti (which is a commercial hair product) affect the speed of hair growth". Her family is willing to volunteer for the experiment.
Write a short basic materials, and basic procedure of her experiment design