Q: Which of the following causes a chemical change?
A: lemon juice added to milk
Q: A squid is an animal that lives in the ocean. It pumps a stream of water out of its body, causing it to move rapidly. Which of the following mechanical systems moves in a way most similar to the squid?
A: a rocket
Q: Which characteristic is an example of learned behavior?
A: a dog scratching at a door to go out
Q: Which is the best tool to measure the angles of a triangular object?
A:
a protractor