Q: What is the transfer of heat by a current? Choices: - radiation - combustion - diffusion - convection A:
convection

Q: Cellular respiration is the reverse or opposite of what? Choices: - spermatogenesis - reproduction - glycolysis - photosynthesis A:
photosynthesis

Q: What is the main greenhouse gas causing global warming? Choices: - nitrogen - sulfur - carbon monoxide - carbon dioxide A:
carbon dioxide