Question

Gaby wants to know if sand heats up faster than water. How can she find out?
Place a cup of sand and a cup of water in the freezer. See which one freezes first.
Put her right hand in a cup of sand and her left hand in a cup of water. Record which one feels the hottest.
Pour a cup of water into a cup of sand. Measure the sand's temperature to see if it changed.
Place a cup of sand and a cup of water in the Sun. Measure their temperatures as they change.