Energy in Ecosystems Key Concept Builder LESSON 3 Key Concept

Name
Date
Class
Chapter 20
Key Concept Builder
LESSON 3
Energy in Ecosystems
Key Concept How does energy move in ecosystems?
Directions: Unlike matter, which cycles through ecosystems, energy flows through ecosystems. In the spaces
below, draw a simple diagram that illustrates the difference between these two concepts. Use arrows in your
diagrams.
1. Cycle:
2. Flow:
3. In which diagram could you include the Sun?
4. Where in the diagram would you place it?
5. Put a check mark next to the phrase that correctly completes this sentence:
The principle that energy cannot be created or destroyed is called the law of
continuation of energy.
preservation of energy.
conservation of energy.
flow of energy.
6. Energy in an ecosystem moves from one
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to another.
Matter and Energy in the Environment
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Directions: Complete each item on the lines provided.
Name
Date
Class
Chapter 20
LESSON 3
Key Concept Builder
Energy in Ecosystems
Key Concept How does energy move in ecosystems?
Directions: Complete this student’s paragraph by choosing terms from the word bank and writing them in the
correct spaces. Some terms may be used more than once.
bacteria
chemosynthesis
compounds
energy
food
organisms
photosynthesis
plants
seafloor
Sun
What are producers?
Producers are (1.)
that use (2.)
to make their own (3.)
. Most producers, like (4.)
, use (5.)
from the (6.)
in a process called (7.)
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Some producers, including certain kinds of (8.)
called (9.)
, use a process
. In this process, (10.)
comes from (11.)
(12.)
.
flowing from beneath the
.
Directions: Circle the terms in parentheses that correctly complete each sentence.
13. In the process used by most producers, the raw materials include
(carbon dioxide/nitrogen), and one of the by-products is (water/oxygen).
14. (Photosynthesis/Chemosynthesis) occurs at places called
(hydrothermal vents/volcanic spires).
Matter and Energy in the Environment
53
Name
Date
Class
Chapter 20
LESSON 3
Key Concept Builder
Energy in Ecosystems
Key Concept How does energy move in ecosystems?
Directions: Draw a line connecting each group of consumers (on the right) with the type of consumer the group
represents (on the left).
1. herbivores
bacteria
2. carnivores
vultures
3. omnivores
pandas
4. detritivores
people
5. decomposers
lions
Directions: Answer each question on the lines provided.
6. If someone is a strict vegetarian, what type of consumer is that person considered
to be?
7. Some wild animals develop a taste for many human foods. These animals have become
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Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
what kind of consumer?
Matter and Energy in the Environment
Name
Date
Class
Chapter 20
Key Concept Builder
LESSON 3
Energy in Ecosystems
Key Concept How is the movement of energy in an ecosystem modeled?
Directions: The boxes below represent the movement of energy through a food chain. Write each word in the box
in the correct order.
hawk
mouse
plants
snake
Sun
1.
Directions: Circle the term in parentheses that correctly completes each sentence.
2. Scientists use a model called a(n) (energy pyramid/food web) to show the amount of
energy that is available in each step of a food chain.
3. The steps in this model are called (feeding relationships/trophic levels).
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
4. Each higher level of the model, has (more energy/less energy/the same energy).
5. A(n) (energy pyramid/food web) consists of overlapping food chains.
Matter and Energy in the Environment
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