Food Chains and Webs

Food Chains and Webs

Fill in the Blank

_____ make their own food by using energy and then building organic molecules.

Fill in the Blank

_____ must consume food from their environment.

Multiple Choice

Plants are autotrophs because they use sunlight to produce chemicals such as sugars. They perform the process of

• chemosynthesis

• photosynthesis

Multiple Choice

There are bacteria in the soil and at deep sea vents which split chemicals for their energy and make their organic molecules. This process is

• chemosynthesis

• photosynthesis

Multiple Choice

Humans are an example of

• producer

• autotroph

• heterotroph

Multiple Choice

All food webs and chains must start with

• producers

• consumers

• decomposers

Multiple Choice

How much energy passes from 1 trophic level to the next?

• 10%

• 50%

• 90%

• 100%

Multiple Choice

A food web is ____

• one list of who eats whom

• all of the possible feeding relationships in an ecosystem

Multiple Choice

Decomposers are essential to food chains and webs because they___

• eat producers

• eat consumers

• recycle nutrients

• recycle metals

Multiple Choice

A primary consumer eats

• a producer

• a secondary consumer

• other primary consumers

Multiple Choice

A tertiary consumer eats

• producers

• primary consumers

• secondary consumers

Multiple Choice

A fox who ate a rabbit who ate a plant is a __________ consumer

• primary

• secondary

• tertiary

• quaternary