Chapter 6: Ecosystems

Which of these lists the levels of ecological organization from simplest to most complex?

• biome, ecosystem, organism, population, community

• community, ecosystem, biome, organism, population

• organism, population, biome, community, ecosystem

• organism, population, community, ecosystem, biome

Corals live near the ocean surface in some warm regions of the world. The corals provide a home for algae. The algae, in turn, produce food that is used by the corals. Which of these is a biotic factor in this ecosystem?

• the temperature of the water

• the salt content of the water

• the size of the algae population

• the amount of sunlight that reaches the coral

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which biome is characterized by trees that replace their leaves annually?

• tropical rain forest

• deciduous forest

• coniferous forest

• tundra

Which of these is a significant abiotic factor in freshwater ecosystems?

• seasonal temperature changes

• freshwater plants

• salinity

• water pressure

Tags

NGSS.MS-ESS2-4

Which correctly shows the transfer of energy within an ecosystem?

• producer --> decomposer --> herbivore --> omnivore

• carnivore --> herbivore --> decomposer --> omnivore

• omnivore --> carnivore --> herbivore --> primary consumer

• producer --> herbivore --> carnivore --> decomposer

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

How much energy is available at the third trophic level if the first trophic level has 300,000 kilocalories of available energy?

• 300,000 kilocalories

• 30,000 kilocalories

• 3,000 kilocalories

• 300 kilocalories

Tags

NGSS.MS-LS2-3

In the diagram shown, which of these food chains is included in the food web?

• snake -->

  mouse --> grass

• grass --> grasshoppers --> frog --> eagle

• trees --> deer --> grass

• grass -->

  mouse -->

  eagle --> snake

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which process in the water cycle removes water from plants?

• evaporation

• precipitation

• perspiration

• transpiration

Tags

NGSS.MS-ESS2-4

In some parts of the world, rain forests are being cut down to make land available for farms. How does the loss of these trees affect carbon dioxide and oxygen in the atmosphere?

• It increases both carbon dioxide and oxygen.

• It decreases both carbon dioxide and oxygen.

• It increases carbon dioxide and decreases oxygen.

• It decreases carbon dioxide and increases oxygen.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Organisms that perform nitrogen fixation belong to which group?

• fungi

• bacteria

• animals

• plants