Test Corrections 3.28

If a flood occurred in this region and significantly reduced the zooplankton population, how could the food web be impacted?

• The loss of zooplankton could cause a decrease in the ocean algae population because the ocean algae would lose its only prey

• The loss of zooplankton could cause a decrease in the polar bear population because there would be a decrease in the polar bear prey that feed on zooplankton.

• The loss of zooplankton will have no impact on the whale population because it has multiple sources of energy.

• The loss of zooplankton could cause an increase in the polar cod population because there would be less competition for the polar cod.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Biologists are studying Laguncula pulchella (L. pulchella), an invasive snail species, because of its significant effect on clam populations in a marine ecosystem. L. pulchella feed on clams and clams feed on algae. Which options describe how L. pulchella impacts energy transfer throughout the marine ecosystem?

• L. pulchella will not have predators in the new environment, therefore they can grow without limit and compete against native species. This will disrupt energy transfers in the food web.

• L. pulchella will cause an increase in the clam population, which will cause an increase in the algae population. This will disrupt energy transfers in the food web.

• L. pulchella will not have prey in the new environment so they will be able to compete against other species. The clam population will also increase and compete with the native species.

• L. pulchella will not have predators in the new environment so they can grow without limit and compete against native species. This will increase energy transfer in the food web.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which question is most relevant to an ecosystem beginning primary succession?

• Why is there no soil, grass, or shrubs present in the

  ecosystem?

• Why are there so many kinds of animals living in the

  ecosystem?

• What types of hardwood trees are growing in the ecosystem?

• What caused the forest fire that destroyed the previous

  ecosystem?

Tags

NGSS.MS-LS2-4

Between 2005 and 2016, the Kenai Fjords in Alaska experienced

an increase in exposed rock due to melting ice. These rock

formations are known as 'nunataks,' which are the tips of mountains

that were left uncovered by glaciers in the last ice age. Nunataks are shown in the image.
Which timeline describes how plant diversity on the nunataks will

change over time?

• Mosses completely cover rock. → Small shrubs grow between

  cracks of rock. → Small trees become rooted in the soil.

• Mosses completely cover rock. → Small trees become rooted in

  the soil. → Small shrubs grow between cracks of rock.

• Small shrubs grow between cracks of rock. → Mosses

  completely cover rock. → Small trees become rooted in the soil.

• Small shrubs grow between cracks of rock. → Small trees

  become rooted in the soil. → Mosses completely cover rock.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Between 2005 and 2016, the Kenai Fjords in Alaska experienced an increase in exposed rock due to melting ice. These rock formations are known as 'nunataks,' which are the tips of mountains that were left uncovered by glaciers in the last ice age. Nunataks are shown in the image.

What sort of succession will these Nunataks go through and why?

• The nunataks have a steep slope, so they will undergo primary

  succession.

• The nunataks have a steep slope, so they will undergo

  secondary succession.

• The nunataks are bare rock, so they will undergo primary

  succession.

• The nunataks are bare rock, so they will undergo secondary

  succession.

Tags

NGSS.MS-LS2-3

The biodiversity of species impacts the stability and sustainability of ecosystems. A group of jaguars have _____ types of prey to hunt in order to survive without running out of food. A population of giraffes has ______ types of plants for them to graze upon. Even animals that compete for similar prey, like lions and cheetahs, have ______ options. The animals also rely on _______ factors such as air and water to help them survive, which are sustainable natural resources.

Choose the option that identifies the missing terms or phrases, in order of appearance in the sentences.

• multiple, few; a variety of; biotic

• few; many; very few; biotic

• multiple; many; a variety of; abiotic

• few; few; very few; abiotic

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Ecologists are studying the relationships between biodiversity, populations, and the stability of a lake ecosystem. Their goal is to increase the sustainability and health of organisms in the lake ecosystem.

Which goal will help the ecologists improve the sustainability and health of organisms in the lake ecosystem?

• Ecologists propose to increase the amount of water in the lake.

• Ecologists propose to decrease the number of native species in the lake.

• Ecologists propose to increase the number of invasive

  species in the lake.

• Ecologists propose to increase the diversity of native species in the lake.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

NGSS.MS-LS2-5

A sample collected by a student has the following characteristics:
1. more dense than water, 2. grey in color, 3. shiny, 4. conducts thermal energy well, 5. can be stretched into wires
What type of material is the sample

• metal

• nonmetal

• metalloid

A sample collected by a student has the following characteristics:
1. less dense than water, 2. white in color, 3. dull appearance, 4. poor conductor of thermal energy, 5. shatters when hit with a hammer

what type of material is it?

• Metal

• Nonmetal

• Metalloid

A sample collected by a student has the following characteristics:

1. yellow in color, 2. more dense than water, 3. shiny appearance, 4. able to be stretched into a wire

• metal

• nonmetal

• metalloid