Q: What are the gas giants mostly made of . Choices: - calcium and helium - nitrogen and helium - hydrogen and carbon - hydrogen and helium A:
hydrogen and helium

Q: Another name for table salt is? Choices: - hydrogen chloride - carbon chloride - dioxide chloride - sodium chloride A:
sodium chloride

Q: How do most plants create food? Choices: - electrolysis - atherosclerosis - glycolysis - photosynthesis A:
photosynthesis

Q: The periodic table is one of the cornerstones of chemistry because it organizes all the known elements on the basis of their what? Choices: - size properties - liquid properties - acid properties - chemical properties A:
chemical properties