I just took a test in school today. What question was I asked?

Question I was asked: Hydrogen gas and oxygen gas combine to form water. Which would be a more concise way of expressing what happens in this chemical reaction?

I just took a test in school today. What question was I asked?

Question I was asked: Ms. Bristol measured the mass of a closed beaker containing several ice cubes. The mass was 100 g. An hour later, after the ice cubes had melted, Ms. Bristol measured the mass of the beaker again. What was the mass of the beaker of water the second time?

I just took a test in school today. What question was I asked?

Question I was asked:
When sound waves with large amplitude are compared to sound waves with small amplitude, which of the following is true?