If you use a solar-powered calculator to calculate the half life of an isotope, you are using what energy source? *
1.Passive solar heat
2.A small generator
3.Photovoltaic cells

What are two ways in which waves erode the land?

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere

The color of the fur is the genotypephenotype.the genetic combination of alleles that determine the fur color is called the genotypephenotype.