science ch.20 lesson 3
Only about _______ percent of the energy in one step of an energy pyramid transfers to the next higher step.
10
In a food chain and a food web, ________ show the movement of energy.
arrows
______ are animals that eat other animals.
carniviores
________ is the process of making food using chemical energy instead of light energy.
chemosynthesis
________ obtain energy by eating other organisms.
consumers
Matter ________ through an ecosystem.
cycles
Another name for bacteria and mushrooms are _______.
decomposer
Consumers called ______ eat dead organisms.
detritovore
An _ _______ shows the amount of energy available in each step of a food chain.
energy pyramid
Energy ________ through an ecosystem.
flows
A ________ is a model that shows how energy flows in an ecosystem through feeding relationships.
food chain
When you overlap the food chains in an ecosystem, the result is a ________.
food web
A ________ eats only plants
herbaviors
Decomposers help cycle ________ through ecosystems
nutreints
______ eat producers and other consumers.
omnivores
The top layer of an energy pyramid contains consumers that eat ________.
other consumers
The process of ________ uses light energy to make food and oxygen from carbon dioxide and water.
photosynthesis
Organisms that make their own food are ________.
producers
The bottom layer of an energy pyramid contains _________
producers
The middle layer of an energy pyramid contains consumers that eat ________
producers
Energy can change form as it moves through an ecosystem, but the total amount of energy ________. This rule is called the law of conservation of energy.
stays the same
As energy changes from one organism to another in an ecosystem, some stored chemical energy changes to ________ energy.
thermal
The steps of this energy model are called ________.
trophic levels