1. Question: Which graph is most similar in shape the density versus temperature graph of water? A B C D

2. Question: A copper ball is just able to pass through a metal ring when the ball is heated. Which of the following predictions is correct? i. When only the ball is heated, it will not pass through the metal ring. ii. When only the metal ring is heated, the ball will pass through the ring. iii. When only the metal ring is heated, the ball will not pass through the ring.

3. Question: The picture on the right is a set-up that intends to prove that our senses cannot be trusted to measure the hotness or coldness of substances. Do you think this set-up will work?