Ecosystem Changes and Energy Flow

What is an organism?

• A non-living thing

• A living thing

• A type of weather

• A kind of rock

Tags

NGSS.MS-LS1-1

Which of the following is a producer in an ecosystem?

• Lion

• Grass

• Mushroom

• Hawk

Tags

NGSS.MS-LS2-3

What does the term "extinct" mean?

• There are too many of a species

• A species no longer exists

• A species is endangered

• A species is a producer

Tags

NGSS.MS-LS4-1

Which of the following is a non-living part of an ecosystem?

• Tree

• Fish

• Sunlight

• Rabbit

Tags

NGSS.MS-LS2-3

What is a decomposer?

• An animal that eats plants

• An organism that breaks down dead material

• A plant that makes its own food

• A non-living thing

Tags

NGSS.MS-LS2-3

Which word describes a species that has very few individuals left and is at risk of disappearing?

• Overabundant

• Endangered

• Producer

• Consumer

If rabbits become scarce in a grassland ecosystem, what is likely to happen to the population of foxes that eat them?

• The fox population will increase

• The fox population will decrease

• The fox population will stay the same

• The foxes will become producers

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following best describes the flow of energy in an ecosystem? Sun → Grass → Rabbit → Fox → Decomposer

• From consumers to producers to decomposers

• From producers to consumers to decomposers

• From decomposers to producers to consumers

• From non-living things to living things to extinct things

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

If a certain plant species becomes overabundant in a pond, what might happen to the other organisms in the pond?

• All animals will become extinct

• The pond may become crowded and some animals may have less space or food

• The water will turn into land

• Nothing will change

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Why are decomposers important in an ecosystem?

• They make their own food

• They break down dead plants and animals, returning nutrients to the soil

• They eat only plants

• They are non-living

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3