Stemscopes Exam Environmental Science

Question 1

What is an ecosystem?

Accepted Answer

All living organisms and their non-living environment interacting together

Answer

Only the living organisms in an area

Answer

Only the non-living factors in an area

Answer

A single species and its habitat

Question 2

What is the role of decomposers in an ecosystem?

Accepted Answer

They break down dead organic matter and recycle nutrients

Answer

They produce food through photosynthesis

Answer

They consume other organisms for energy

Answer

They compete with producers for sunlight

Question 3

Which of the following is a renewable energy resource?

Accepted Answer

Solar energy

Answer

Coal

Answer

Natural gas

Answer

Petroleum

Question 4

What is the greenhouse effect?

Accepted Answer

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

Answer

The cooling of Earth's surface at night

Answer

The effect of plants on temperature

Answer

The reflection of sunlight by ice caps

Question 5

What is biodiversity?

Accepted Answer

The variety of species and genetic variation in an area

Answer

The total number of trees in a forest

Answer

The number of ecosystems on Earth

Answer

The number of food chains in an ecosystem

Question 6

Which process describes water changing from liquid to vapor?

Accepted Answer

Evaporation

Answer

Condensation

Answer

Precipitation

Answer

Infiltration