Question: Q: When this forms underground, volcanoes rise?    Choices:  - pumice  - soil  - CO2  - magma  A:
Answer: magma

Question: Q: What impact does photosynthesis have on the direction of electron flow?    Choices:  - repeats it  - cycles it  - cools it  - reverses it  A:
Answer: reverses it

Question: Q: Diffusion is an effective transport mechanism over the spatial scales typically found at what level?    Choices:  - electromagnetic  - molecular  - atom  - cellular  A:
Answer: