3.2 Energy, Producers, and Consumers - isd2135.k12.mn.us

Name Class Date

3.2 Energy, Producers, and Consumers

Lesson Objective

Define primary producers.
Describe how consumers obtain energy and nutrients.

BUILD vocabulary

A. The chart below shows key terms from the lesson with their definitions. Complete the chart by
writing a strategy to help you remember the meaning of each term. One has been done for you.

Term Definition

An organism that uses energy from the sun or chemicals and
converts it into forms that living cells can use; also known as an
organism that produces its own food
A type of consumer that kills and eats other animals

Process by which chemical energy is used to produce
carbohydrates

An organism that relies on other organisms for energy

An organism that feeds by chemically breaking down other
organisms

An organism that feeds on detritus, or small pieces of dead and
decaying plants and animals

An organism that obtains energy by feeding on plant parts

A consumers that ingests other organisms for energy

Continued on next page
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Name Class Date

Term Definition

An animal that eats both plants and animals

Process that uses light energy to power chemical reactions
that convert carbon dioxide and water into oxygen and
carbohydrates
Autotrophs or the first producers of energy-rich compounds
that are later used by other organisms

Animals that consume the carcasses of other animals that
have been killed by predators or died of natural causes

Primary Producers

Autotrophs are also called primary producers. Two processes used to make food are
photosynthesis and chemosynthesis.

Complete the Venn diagram below to compare and contrast photosynthesis with
chemosynthesis. Place each word from the box below in the correct location.

algae primary producers requires light
cyanobacteria produces carbohydrates sulfur bacteria
green plants produces oxygen uses hydrogen sulfide

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Name Class Date

BUILD Understanding

Concept Map A concept map can help you organize information and show how ideas are

connected. The concept map below shows the relationships between different types of organisms
in this lesson.

As you read the lesson, place the terms from the box in the correct location in the concept
map.

decomposer detritivore omnivore carnivore
photosynthesis chemosynthesis herbivore primary producer
heterotroph scavenger

also
called

autotroph

uses solar uses chemical
energy for energy for the
the process of process of

is ingested also called a
by a

consumer

metal-eating

plant-eating plant and metal-eating

detritus detritus-

producing feeding

Follow the directions.
1. List each of the terms in the concept map that is a type of consumer.

2. Name the two processes that autotrophs use to make carbohydrates.