Unit Review WU

EnvSci: Spheres, Cycles & Systems

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10 Multiple Choice

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1. You form a new rock through a heating and cooling process that alters the crystal structure without fully melting it. The rock you end up with is____

A Sedimentary

B Metamorphic

C Anthropomorphic

D Igneous

2. As you move upwards in the atmosphere, how does the temperature change?

A Steady cooling

B Steady heating

C Alternating cooling and heating

D No regular pattern

3. What force in nature is most responsible for the formation of ocean waves?

A Gravity

B The spin of the earth

C Earthquakes

D Wind

4. What is eutrophication?

A The growth of life after disaster

B Algal growth & death disrupts water ecosystems

C The build-up of nitrogen in bacteria

D The development of agricultural systems

5. Mineral dehydration is one hypothesis proposed for the formation of what?

A Plate tectonics

B Water on earth

C The first cells of life

D The ozone hole

6. What change led to the formation of BIFs (banded iron formations) about 1-2 billion years ago?

A Loss of CO₂

B Increased O₂

C Loss of O₃

D Increased N₂

7. Which of the following composes 2% of the hydrosphere?

A Frozen fresh water

B Frozen salt water

C Liquid fresh water

D Liquid salt water

8. From what climate zone was this climograph’s data collected?

A Polar zone

B Temperate zone

C Subtropical zone

D Tropical zone

9. In which year did the CO₂ concentration reach 350 ppm?

A 1970

B 1980

C 1990

D 2000

10. The earliest forms of life on earth were probably...

A Photosynthetic plants

B Photosynthetic bacteria

C Chemosynthetic bacteria

D Chemosynthetic plants