1. A substance which consists of atoms that are alike is called   an element   a mixture   a compound   an alloy   Hint Half-n-half Clue   2. Which of the following is an element?   Salt   Water   Air   Aluminum   Half-n-half Clue   3. The weight of an object is best determined by a beam balance rather than a spring balance.   True   False   4. _______ typically combine together to form molecules.   Electrons   Atoms   Elements   Protons   Half-n-half Clue   5. A change of state from liquid to solid typically occurs when there is a sudden rise in temperature.   True   False   6. How many natural elements are there?   88   92   103   113   Half-n-half Clue   7. Of the three states of matter, which one has neither definite volume nor definite shape?   Air   Solid   Gas   Liquid   Half-n-half Clue