1) What is chemistry the study of? a) Only liquids b) How electricity works c) What matter is made of and how it changes d) The study of animals 2) What are atoms? a) The largest particles of matter b) b) Tiny particles that make up matter c) c) A type of gas d) d) Particles you can see with your eye 3) What is a molecule? a) A single atom b) b) A gas in the air c) c) A group of atoms bonded together d) d) A mixture of gases 4) What happens in a physical change? a) A new substance is formed b) b) Matter changes into fire c) c) Matter changes shape or state but stays the same d) d) Atoms disappear 5) What happens in a physical change? a) A new substance is formed b) b) Matter changes into fire c) c) Matter changes shape or state but stays the same d) d) Atoms disappear 6) Which model shows how atoms are joined together in a molecule? a) A globe b) b) A thermometer c) c) A particle diagram d) d) A molecular model 7) An element is made of only one kind of atom. a) True b) / False) 8) Ice melting into water is a chemical change a) True b) False 9) A water molecule is made of one oxygen atom and two hydrogen atoms. a) True b) false 10) A model helps scientists understand things that are too big or too small to see. a) true b) false 11) Carbon dioxide is part of what we exhale a) false b) true 12) When metal is melted and poured into a mold, what happens to its total amount of matter? a) - It decreases. b) - It stays the same but takes a new shape. c) - It increases. d) - It turns into gas and disappears 13) Why do blacksmiths heat metal before shaping it? a) - To make it disappear. b) - To remove weight from the metal. c) - To soften it for reshaping. d) - To change it into a new type of material. 14) What happens to an aluminum can when it is crushed? a) - The total amount of metal decreases. b) - It becomes lighter and loses mass. c) - Its shape changes, but the total amount of aluminum stays the same. d) - The aluminum transforms into a gas.

investigating matter

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