Question: Choose your answer.

Students dropped different rocks into sand to simulate meteorite impacts. Their goal was to determine which rock made the deepest crater. Which variable should the students control in order to have the most accurate results?
My Answer: the height from which the rocks are dropped

Question: Choose your answer.

Which describes the role of sexual reproduction in plants and animals?
My Answer: ensures the continuation of the species

Question: Choose your answer.

How can you make liquid water become solid?
My Answer: Put the water in a very cold place.

Question: Choose your answer.

A medical research team is trying to determine whether a cream that is rubbed on the chest will help reduce the coughing associated with a particular illness. The team conducts the research using several groups of people. Which step will most likely result in producing a dependent (responding) variable that will help validate their research?
My Answer:
applying the same amount of cream to each person