Stemscopes Exam Environmental Science

Question 1

What is an ecosystem?

Accepted Answer

All living organisms and their non-living environment interacting together

Answer

An ecosystem includes all living organisms (biotic factors) and non-living components (abiotic factors) that interact in a specific area.

Question 2

What is the role of decomposers in an ecosystem?

Accepted Answer

They break down dead organic matter and recycle nutrients

Answer

Decomposers like bacteria and fungi break down dead organisms and waste, returning nutrients to the soil.

Question 3

Which of the following is a renewable energy resource?

Accepted Answer

Solar energy

Answer

Solar energy is renewable because it is continuously supplied by the Sun and will not run out on human timescales.

Question 4

What is the greenhouse effect?

Accepted Answer

The trapping of heat in Earth's atmosphere by certain gases

Answer

The greenhouse effect occurs when atmospheric gases like CO₂ and methane trap outgoing infrared radiation, warming Earth's surface.

Question 5

What is biodiversity?

Accepted Answer

The variety of species and genetic variation in an area

Answer

Biodiversity refers to the variety of life forms, including species diversity, genetic diversity, and ecosystem diversity.

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