Conservation of Matter
What happens to the mass of a tablespoon of salt after it dissolves in water?
It would stay the same.
An ice cube has a mass of 5 grams just after taking it out of the freezer. What is the mass after it melts?
5 grams
Mr. Green was building a squirrel feeder. He had two pieces of wood that weighed 2 kg. When he cuts the wood pieces into two, how many pieces of wood will Mr. Green have?
4 pieces