Chemistry helps firefighters A. identify the temperatures at which different substances burn

B. calculate how much water pressure is available at a hydrant

C. determine which chemicals to use to fight different types of fires

D. know the angles at which they can safely deploy ladders

In an oxidation-reduction reaction, oxidation is what happens when a reactant

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Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line