MATTER CYCLES THROUGH ECOSYSTEMS.
Homework 2-12
14.2 Reading Study Guide A
BIG IDEA Matter
KEY CONCEPT
and energy together support life within an environment.
Matter cycles through ecosystems.
Vocabulary
cycle a series of events that happen over and over again
water cycle the movement of water through the environment
carbon cycle the movement of carbon through Earth’s atmosphere and its
ecosystems
nitrogen cycle an important element that cycles through Earth
Review
Copyright © by McDougal Littell, a division of Houghton Mifflin Company
1.
Think of a desert ecosystem.
List three biotic and three abiotic factors that are present there.
Take Notes
I.
All ecosystems need certain materials.
2.
What are three important cycles in ecosystems?
II. Water cycles through ecosystems.
3.
Fill in the blanks to complete the statements about the water cycle.
Three processes move water through the environment:
• Water leaves the oceans through _____________.
• As water vapor _____________ on dust particles, it forms clouds.
• When water falls from clouds, it is called _____________.
4.
Draw and label a sketch to answer each
question:
• How do animals release water vapor?
• How do plants release water vapor?
ECOLOGY, CHAPTER 14, READING STUDY GUIDE A 23
CHAPTER 14
Ecosystems and Biomes
SECTION
CHAPTER 14
Ecosystems and Biomes
III. Carbon cycles through ecosystems.
5.
Every living thing contains carbon. How do animals get carbon?
6.
Fill in the diagram with facts about plants.
Get carbon from. . .
Use carbon for . . .
Plants
Return carbon to
ecosystem by . . .
7.
All living things need nitrogen in order to grow and survive. Plants are not able
to use nitrogen in gas form. Number the following statements to explain how
plants and animals obtain nitrogen.
_____________ Lightning breaks apart nitrogen molecules.
_____________ The nitrogen compound falls to the ground with rain.
_____________ Animals get nitrogen from eating plants.
_____________ Nitrogen molecules join another element to form a compound.
_____________ Plants take in the nitrogen compounds through their roots.
_____________ Nitrogen gas makes up about four-fifths of our air.
8.
Choose one cycle you just read about. Draw a picture that shows the parts of
the cycle. Then explain your picture to a classmate.
24 ECOLOGY, CHAPTER 14, READING STUDY GUIDE A
Copyright © by McDougal Littell, a division of Houghton Mifflin Company
IV. Nitrogen cycles through ecosystems.