Alonzo and meg were testing different surfaces to see which one had the least friction. they predicted that the car, seen above, would travel fastest down the ramp when the surface covering had the least friction. alonzo and meg used carpet, sandpaper, and glass to cover the ramp. they let the car go, not pushing it, but letting gravity pull the car to the bottom of the ramp.

what were the controlled variables in the experiment?

Diego conducted an experiment to find out what kind of ball bounces the highest when dropped from a five-foot platform. he used a golf ball, a tennis ball, and a soccer ball. he dropped each ball from the balcony once. diego recorded his observations after each drop. what can diego do to best improve the reliability of his results? a) drop each ball from the platform three more times b) record his observations in more than one unit c) write at least two scientific questions after the experiment is complete d) share his results with other people who have done similar experiments you for the !

Drag each tile to the correct location. match each trait that an organism displays to a reproductive strategy.

The hypothesis that evolution occurs at an irregular rate through geologic time is known as: directional evolution directional equilibrium punctuated equilibrium punctuated evolution