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