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ACT Science Practice Set #1

Teacher: Mrs. S. Vandervort
Across
A material that allows heat or electricity to flow through it with minimal resistance
A substance composed of two or more chemically bonded elements
Scattering of light
The temperature at which additional thermal energy causes a substance to change from liquid to vapor
An instrument used to measure atmospheric pressure
Lowest possible temperature, approximately -273 degrees
Down
A variable that stays constant in an experiment allowing the effect of another variable to be measured
The main pigment in plants that captures light energy during photosynthesis
A substance that speeds up a chemical reaction without being changed by the reaction
Cancer causing agent
An organic compound like sugar or starch that contains carbon, hydrogen, and oxygen at a ratio 1:2:1; also the main source of energy for humans
A sample in which no variables are tested, thus serving as a basis for comparison
Compound with a pH greater than 7
A substance compound of two or more metals
Compound with a pH less than 7