Chemical property A property that describes the ability of a substance to react

Chemical bond The forces that join atoms to each other

element A substance made up of only one kind of atom

compound A substance made up of 2 or more different elements

Physical property A property that describes the characteristics of a substance that can be measured without changing the characteristics of the substance

solubility The ability to be dissolved

mixture A combination of 2 or more kinds of matter, each of which keeps its own physical properties

Change of state Occurs when heat is added to or taken away from a substance

melting Occurs when a solid becomes a liquid

evaporation Occurs when a liquid becomes a gas

condensation Occurs when a gas becomes a liquid

freezing Occurs when a liquid becomes a solid

Water H₂OH₂O

salt NaCl

sugar C ₆ H ₁₂ O ₆

Physical change A window breaking

Physical change Butter melting

Chemical change A nail rusting

Chemical change Paper burning

chemical Metal reacting

Physical change Water freezing

Chemical change Production of gas

20 mL of water in a pie pan Which will evaporate 1 st ? 20 mL of water in a pie pan OR 20 mL of water in a glass

3 mL of water at 60 ◦c Which will evaporate 1 st ? 3 mL of water at 60◦c OR 3 mL of water at 30 ◦c

10 mL of water in the sun Which will evaporate 1 st ? 10 mL of water in the shade OR 10 mL of water in the sun

15 mL of water in an area with low humidity Which will evaporate 1 st ? 15 mL of water in an area with high humidity OR 15 mL of water in an area of low humidity

5 mL of water Which will evaporate 1 st ? 15 mL of water OR 5 mL of water