When something remains mostly the same over time it is said to have....?

• Uneventful

• Potential Energy

• Stability

• Boring

A large population of squirrels lives in a forest. In the last 50 years, the size of the squirrel population has stayed the same. What must be true about the squirrel population during the last 50 years?

• No squirrels were born and no squirrels died.

• Humans started protecting the squirrel population so they stopped dying.

• The squirrels did not have any baby squirrels during these years.

• The number of squirrels that were born was the same as the number of squirrels that died.

A consumer population is the population that....

• is eaten by others.

• eats others.

Tags

NGSS.MS-LS2-3

A resource population the population that....

• gets eaten by others

• eats others.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

If the resource population decreases, then the consumer population will....

• Increase

• Stay the same

• Decrease

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The diagram above is called a food web. It shows the relationship between foxes and voles. What does the food web show?

• foxes eat voles

• voles eat foxes

• voles compete with foxes

• foxes compete with voles

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Energy storage molecules are:

• molecules required only for the birth rate

• potatoes

• a molecule organisms use to stabilize a population

• a molecule that organisms can use to release the energy needed to survive

Tags

NGSS.MS-LS1-7

A population of bluefish lives in the Gulf of Mexico. Over the last 50 years, the size of the bluefish population has decreased. What best explains the decrease in the size of the bluefish population?

• A lot of bluefish died and no new bluefish were born.

• More bluefish were born than died.

• Fewer bluefish were born than died.

• The bluefish population is always decreasing because bluefish are always being eaten.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

How would the herring population be affected by an increase in the tuna population?

• The herring would not be affected by a change in the tuna population.

• The herring would increase because more tuna would eat more squid and squid consume herring.

• The herring would decrease because an increase in the tuna would cause all other populations to decrease.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

How would a decrease in the eagle population affect the bear population?

• The bear population would decrease because a decrease to one population in an ecosystem leads to a decrease in all populations.

• The bears would remain the same because bears don't eat eagles.

• The bear population would increase because they would have less competition for trout, leaving more trout to consume, giving them more energy to reproduce.

• The bear population would increase because there would be less trout and less energy for the bears.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4