5th Science Unit 1 Lessons 1-4 Review

What is an ecosystem?

• The interactions among living and non-living things in an environment.

• A type of organism that can only be seen with a microscope.

• A bunch of moving parts that do work.

• The newest craze in social media.

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What is the order of the four layers in a tropical rainforest, from bottom to top?

• canopy, forest floor, understory, emergent layer

• forest floor, understory, canopy, emergent layer

• forest floor, emergent layer, understory, canopy

• understory, forest floor, emergent layer, canopy

A(n) ________ is any organism that makes its own

food.

• animal

• herbivore

• producer

• consumer

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Energy enters most ecosystems as ______

• sunlight

• moving air

• water currents

• electricity

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A lion is a(n) _______, an organism that gets food by eating other organisms.

• plant

• producer

• consumer

• herbivore

The process that breaks down food into simple materials that an animal’s body can use is

called ______.

• digestion

• circulation

• respiration

• photosynthesis

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Like other consumers, all of the food energy that humans use once came from the ______.

• soil

• moon

• ocean

• sun

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When a decomposer dies, its once-living material becomes waste. These wastes are then

• converted into energy that can be used.

• transformed into bacteria that fungi can eat.

• further decomposed by producers and consumers.

• released into the air, soil, and water of an ecosystem.

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Compost takes advantage of natural processes to

• increase the temperature on Earth.

• provide animals with clean drinking water.

• help return matter to their ecosystem.

• release harmful metals into the environment.

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You build a compost pile using kitchen waste like egg shells and banana peels. Three weeks

later, you check your compost. Which of the following observations is the BEST evidence of

decomposition?

• There was no color change.

• There was no change in smell.

• The kitchen scraps became smaller over time.

• The kitchen scraps and the container became cold in temperature.

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