If sulfur dioxide causes pollution, then what causes pollution in rain? Answer choices: - sulfur dioxide - carbon dioxide - nitrogen - contamination - smog - hydrogen - fossil fuels - flooding
sulfur dioxide

If natural processes can have a negative impact on the environment, then what kind of process can have a negative impact on an environment? Answer choices: - coal - natural - Pesticides - flooding - cigarettes - Smoking - Cars - burning
natural

Q: If keeping food cold is used to keep food simple and natural as possible, then what is used to keep foods as simple and as natural as possible? Answer choices: - Energy - sodium - lipids - heat - RNA - cold - fibers - sugar
A: cold

Question: If methane produces electricity when burned, then what does methane produce when burned? Answer choices: - carbon dioxide - energy - electricity - The atmosphere - heat energy - adding heat - It expands - kinetic energy
Answer: electricity

*Question*
If digestion involves saliva, then what does digestion involve? Answer choices: - ovaries - saliva - Energy. - chemicals - heat - cooking - cooking food - matter
**Answer**
saliva

Q: If aprism bends light rays, then what may bend light rays? Answer choices: - fibers - prism - an ion - sun - a wave - lightbulb - forces - flashlight
A: prism