8.L.5.1 to 8.L.5.2

Interactions among organisms can:

• create stability within ecosystems

• facilitate or restrain (limiting factors) growth

• enhance or limit the size of populations

• maintaining the balance between available resources and those who consume them

• change only biotic factors

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

A stable ecosystem is one where

• the population numbers of each organism change at a predictable rate

• the supply of resources in the physical environment changes at a predictable rate

• energy flows through the ecosystem at a fairly constant rate over time

• All of the above

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Plants use CO2 in the process of ___________________ to make ___________ and oxygen.

• cellular respiration, water

• photosynthesis, glucose (sugar)

• photosynthesis, water

• cellular respiration, glucose (sugar)

Tags

NGSS.MS-LS1-6

Which is true of the relationship between the grass and lion?

• The grass is the consumer and the lion is the producer.

• As the grass population increases, the lion population increases.

• As the grass population decreases, the lion population increases.

• As the grass population increases, the lion population remains

  the same.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

The diagram below shows the territories for various populations in the same ecosystem. Use the diagram to answer question #1. Which territory would support the largest population of organisms?

• W

• X

• Y

• Z

Tags

NGSS.MS-LS2-1

What kind of Ecosystem is known as sustainable?

• The one in which all species are in balance

• The one in which there are no animals

• The one in which animals feed on each other

• None of the above

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

NGSS.MS-LS2-5

A lion is at the top of the food chain, where it is responsible for eating numerous animal species. The lion's job in its ecosystem is to help control the population of other animals in the ecosystem by hunting and eating them. Which of the following best describes the role of a lion within its ecosystem?

• The one in which all species are in balance

• The one in which there are no animals

• The lion’s niche as a predator within the ecosystem

• The lion's niche as decomposer within the ecosystem

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

The table below shows information about two mammals that live in forests in North Carolina. Use the table below to answer the question. What is most likely the relationship between the two animals?

• commensalism

• coexistence

• cooperation

• symbiosis

Tags

NGSS.MS-LS2-2

Which is an abiotic factor that would affect the growth of a population within an ecosystem?

• The availability of water would affect the growth of a population within an ecosystem.

• The availability of producers would affect the growth of a population within an ecosystem.

• The type of herbivores present would affect the growth of a population within an ecosystem.

• The number of carnivores present would affect the growth of a population within an ecosystem.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

List 3 biotic factors in an ecosystem.

Tags

NGSS.MS-LS1-4

NGSS.MS-LS2-2