| A | B |
|---|
| radiation | emission of energy in the form of rays or waves |
| recessive | an allele for a trait that will be masked unless the organism is homozygous for this trait |
| screw | a type of simple machine that consists of an inclined plane wrapped around a cylinder |
| sexual reproduction | reproduction involving the union of gametes producing an offspring with traits from both parents |
| spectroscope | an instrument that uses a prism to separate and catalog light wavelengths |
| speed | amount of distance traveled divided by time taken; the time |
| spring tide | the tide of increased range that occurs twice monthly at the new and full phases of the Moon |
| thermal | energy internal energy found by adding the kinetic energy of particles making up a substance |
| tropism | the motion of an organism or part of an organism toward or away from an external stimulus |
| trough | the lowest point on a wave |
| variable | "an event |
| velocity | the time |
| vibration | a repetitive movement around an equilibrium point |
| virus | "a noncellular |
| wavelength | the distance between crests of a wave |
| wedge | a type of simple machine that consists of an inclined plane used to separate two objects |
| wheel and axle | "a type of simple machine that consists of a rod driven through the center of a cylinder that is allowed to rotate freely |
