When light waves are emitted by a moving source scientists can measure: the Doppler effect. Scientists extrapolate backwards in time to derive cosmic microwave background radiation particle accelerators . Scientists smash together tiny bits of matter using :

Long term exposure to waves can cause sunburns and skin cancer.

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.

Consider the following planned experiment. factor experimental group control group light exposure tots of sun tots of sun amount of water weekly weekly type of soil nutrient rich nutrient rich size of pot large which variable is being tested in this experiment? small a. size of pot b. type of soil c. light exposure d. amount of water