Ecosystem

What is an ecosystem?

• A community of living organisms interacting with their physical environment

• A group of the same species living in an area

• A collection of different species living in different areas

• A single species living in isolation

Tags

NGSS.MS-LS2-3

Which of the following is a biotic component of an ecosystem?

• Water

• Sunlight

• Plants

• Soil

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NGSS.MS-LS1-4

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What role do decomposers play in an ecosystem?

• They produce energy through photosynthesis

• They break down dead organisms and recycle nutrients

• They consume primary producers

• They compete with herbivores for food

Tags

NGSS.MS-LS2-3

Which of the following is an example of a freshwater ecosystem?

• Desert

• Coral reef

• Pond

• Savanna

What is the primary source of energy for most ecosystems?

• Wind

• Sunlight

• Geothermal heat

• Tidal energy

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

In a food chain, which organism is typically at the top?

• Herbivore

• Carnivore

• Producer

• Decomposer

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NGSS.MS-LS2-3

How do plants contribute to the carbon cycle in an ecosystem?

• By releasing carbon dioxide during photosynthesis

• By absorbing carbon dioxide during photosynthesis

• By converting carbon dioxide into oxygen during respiration

• By storing carbon dioxide in their roots

Tags

NGSS.MS-LS1-6

Which of the following best describes a keystone species?

• A species that is the most abundant in an ecosystem

• A species that has a disproportionately large impact on its ecosystem

• A species that is at the top of the food chain

• A species that is the primary producer in an ecosystem

Tags

NGSS.MS-LS2-2

What is the term for the variety of life within an ecosystem?

• Biomass

• Biodiversity

• Biogeography

• Biomagnification

Tags

NGSS.MS-LS2-5

Which of the following is a characteristic of a healthy ecosystem?

• Low biodiversity

• High levels of pollution

• Stable populations of organisms

• Lack of predators

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

NGSS.MS-LS2-5