39
Test 2
Read the statements below. For each question, mark the correct letter A,
B, C or D.
1. Climate is determined by measuring the amount of _______ over many
years.
A. water, rain, snow
B. light, temperature, precipitation
C. light, darkness, twilight
D. precipitation, evaporation, rain
2. When you study an ecosystem, you study how living things affect
A. other living things.
B. nonliving factors.
C. the environment.
D. all above-mentioned.
3. The largest single source of energy used for human electricity demands is
A. coal.
B. oil.
C. solar power.
D. nuclear energy.
4. The first living cell appeared __________ years ago.
A. 4–3.8 billion
B. 550 million
C. 1.8 billion
D. 8.8 billion