Dynamic Ecosystems

Samantha plants some flowers in a flower bed and then ignores them. Soon weeds grow and the flowers die. The weeds had been able to get enough resources to survive, while the flowers had not. This is an example of _____.

• competition

• population size

• habitat

• community

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Ecological succession can begin when seeds are carried to bare areas by birds or the wind.

• True

• False

If an existing ecosystem is destroyed, ________.

• primary succession occurs

• secondary succession occurs

• a climax community comes into existence

• a different type of biome emerges

As eutrophication occurs, populations of algae grow. How does this speed up succession?

• The algae use so much of the oxygen in the water that fish die, decay and add to the build up of soil.

• The algae become soil.

• The growth of the algae causes pollution to increase.

• The presence of the algae encourages sediment to drop out of streams into the pond.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Which type of succession would occur here?

• Primary

• Secondary

• Both

Tags

NGSS.MS-LS2-4

The first species to populate an area after a disturbance is called:

• Pioneer species

• Pilgrim species

• Founder species

• Primary species

Both the lion and the cheetah eat some of the same prey in this ecosystem. Two organisms going after the same resource is known as

• Mutualism

• Parasitism

• Competition

• Commensalism

Tags

NGSS.MS-LS2-2

If the populations of grasshoppers would decrease, what affect would that have on the population of lizards?

• Increase

• Stay the same

• Decrease

• Unable to determine

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

If the population of rattlesnakes were to decrease, why would that help to increase the population of hawks?

• Rattlesnakes eat hawks

• Hawks eat rattlesnakes

• Rattlesnakes and hawks both eat kangaroo rats.

• It would not help the hawk population.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Characterized by constant change, activity, or progress.

• Dynamic

• Matter

• Disruptive

• Mass

Tags

NGSS.MS-ETS1-4