1. How many natural elements are there?   88   92   103   113   Hint Half-n-half Clue   2. A chemical change takes place when ice melts to water.   True   False   3. Which of the following occurs during evaporation?   Molecules escape from the liquid surface.   Steam and oxygen escape from the liquid bulk.   Molecules escape from the liquid bulk.   Steam and oxygen escape from the liquid surface.   Half-n-half Clue   4. Liquids can be poured but solids cannot. Which statement explains this?   Molecules in solids are not in a state of vibration.   The force of attraction between molecules is less in liquids than in solids.   Liquids flow because of gravity.   Liquids take the shape of the container in which they are poured.   Half-n-half Clue   5. Of the three states of matter, which one has definite volume but no definite shape?   Water   Liquid   Solid   Gas   Half-n-half Clue   6. Which of the following is an element?   Salt   Aluminum   Air   Water   Half-n-half Clue   7. A change of state from liquid to solid typically occurs when there is a sudden rise in temperature.   True   False