Sara uses the volume control on her TV to make the sound louder or softer. Which Property of waves is Sara's volume control changing ? 1)Amplitude
2)Wave period
3)Wavelength.
4)Wave speed.

Liquid water turns into water vapor at which step in the water cycle

If the frequency of the p allele is .63 in the population then what is the frequency of the q allele?

Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c.ozone layer hole d.increase in sea levels