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[DIGITAL] Populations and Resources

Authored by Ann Libo-on

Science

7th - 8th Grade

NGSS covered

Used 21+ times

[DIGITAL] Populations and Resources
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22 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

A population of tigers lives in Bangladesh. Over 50 years, the size of the tiger population increased. What best explains the increase in the size of the tiger population?

A lot of tigers were born and none of them died.

The tiger population is always increasing because no animal eats tigers.

Fewer tigers were born than died.

More tigers were born than died.

Tags

NGSS.MS-LS2-4

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Scientists have been studying the size of three populations in a grassland. In this ecosystem, lizards eat fireflies, and fireflies eat gnats (a type of insect). The data showed that all three populations were stable. Then the lizard population decreased suddenly. What will most likely happen to the size of the firefly population as a result?

increase. The smaller lizard population will need fewer energy storage molecules so they will eat fewer fireflies. This will lead to fewer deaths than births in the firefly population.

increase. The smaller lizard population will leave more energy storage molecules available for the firefly population to reproduce more. This will lead to more births in the firefly population.

stay the same. The size of its resource population did not change, so the amount of energy storage molecules available for the fireflies did not change. There will be the same number of births and deaths in the firefly population.

decrease. A decrease in any population causes a decrease in the sizes of all other populations in the ecosystem.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-2

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Elephants eat grass. What is the consumer population?

Elephants

Grass

Both are the consumer population

Neither are the consumer population

Tags

NGSS.MS-LS2-1

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

In Australia, both opossums and foxes eat rats. The sizes of the populations have been stable for the last 12 years, but recently the size of the opossum population increased. What will likely happen to the fox population?

increase. An increase in the size of any population leads to an increase in the sizes of all other populations in an ecosystem.

stay the same. Opossums and foxes do not eat each other, so the number of births and deaths in the fox population will stay the same.

decrease. The larger opossum population will leave fewer energy storage molecules for all other populations in the ecosystem, so the fox population will reproduce less. This will lead to fewer births than deaths in the fox population.

decrease. Fewer energy storage molecules will be available to the fox population from the smaller rat population, so the fox population will reproduce less. This will lead to fewer births than deaths in the fox population.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-3

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

A population of mice lives in the northeastern United States. Over the last 50 years, the size of the mouse population decreased. What best explains the decrease in the size of the mouse population?

Fewer mice were born than died.

A lot of mice died and no new mice were born.

More mice were born than died.

The mouse population is always decreasing because mice are always being eaten.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Moon Jelly populations are decreasing. Why?

There are more births than deaths

There are less births than deaths

The population is stable

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

What do organisms use energy for?

Digesting food

Reproduction

Moving around

Everything they do to survive

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

NGSS.MS-LS1-7

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