Q: Compounds like sodium chloride form structures called what? A:
OPTIONS:
- ions
- microorganisms
- hydrocarbons
- crystals

Answer: crystals

Question: Q: What is the term for physicians and scientists who research and develop vaccines and treat and study conditions ranging from allergies to aids? A:
OPTIONS:
- endocrinologists
- vaccinologists
- virologists
- immunologists
Answer: immunologists

input with options: Q: What do you call a compound that contains both an amino group and a carboxyl group in the same molecule? A:
OPTIONS:
- carbolic acid
- compound acid
- catalyst
- amino acid
output: amino acid

Q: Q: What do opposite charges do to one another? A:

OPTIONS:
- strengthen
- weaken
- repel
- attract

A: attract

input: OPTIONS:
- projecting glass
- seeing glass
- traversing glass
- magnifying glass Now, answer this question: Q: What is another term for a hand lens? A:
A:
output: magnifying glass

Question: Q: What gas produced by fossil fuel use is a major cause of global warming? A:
OPTIONS:
- helium
- hydrogen
- phosphorous
- carbon dioxide
Answer:
carbon dioxide