heterotrophs. Producers provide the basis for an ecosystem's energy. Some consumers eat producers. For example, moose and elk eat plants. Some consumers eat other consumers. For example, the grey wolf eats moose and elk. But all consumers depend on producers. Without producers, moose and elk could not survive and without moose and elk, the wolf could not survive. • The pr means Plants are producers, or autotrophs. Animals are consumers, or hete Circle the names of three consumers in the paragraph above. MSTANT REPLAY

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SECTION
13.3 Energy in Ecosystems
KEY CONCEPT Life in an ecosystem requires a source of energy.
Producers provide energy for other organisms in
an ecosystem.
In Section 13.2 you read that ecosystems are made up of both biotic and
abiotic factors. Another important part of an ecosystem is the flow of
energy. All organisms need a source of energy in order to survive.
• Producers are organisms that make their own food. Plants and other
photosynthesizing organisms are producers. Producers are also called
autotrophs.
Consumers are organisms that get their energy by eating other
organisms, including plants and animals. Consumers are also called
heterotrophs.
Producers provide the basis for an ecosystem's energy. Some consumers
eat producers. For example, moose and elk eat plants. Some consumers eat
other consumers. For example, the grey wolf eats moose and elk. But all
consumers depend on producers. Without producers, moose and elk
could not survive and without moose and elk, the wolf could not survive.
VOCABULARY
The suffix -troph comes
from a Greek word mean-
ing "nourishment," or food.
• The prefix auto-means
"self."
• The prefix hetero-
means "different."
Plants are producers, or autotrophs.
Animals are consumers, or heterotrophs.
Circle the names of three consumers in the paragraph above.
STANT
REPLAY
Transcribed Image Text:SECTION 13.3 Energy in Ecosystems KEY CONCEPT Life in an ecosystem requires a source of energy. Producers provide energy for other organisms in an ecosystem. In Section 13.2 you read that ecosystems are made up of both biotic and abiotic factors. Another important part of an ecosystem is the flow of energy. All organisms need a source of energy in order to survive. • Producers are organisms that make their own food. Plants and other photosynthesizing organisms are producers. Producers are also called autotrophs. Consumers are organisms that get their energy by eating other organisms, including plants and animals. Consumers are also called heterotrophs. Producers provide the basis for an ecosystem's energy. Some consumers eat producers. For example, moose and elk eat plants. Some consumers eat other consumers. For example, the grey wolf eats moose and elk. But all consumers depend on producers. Without producers, moose and elk could not survive and without moose and elk, the wolf could not survive. VOCABULARY The suffix -troph comes from a Greek word mean- ing "nourishment," or food. • The prefix auto-means "self." • The prefix hetero- means "different." Plants are producers, or autotrophs. Animals are consumers, or heterotrophs. Circle the names of three consumers in the paragraph above. STANT REPLAY
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