1. A phosphate group. These give the molecule a negative charge.
2. A nitrogen base. There are four different nitrogen bases though, so be careful. The four different nitrogen bases are Adenine, Guanine, Cytosine, and Thymine.
A lava fountain is an example of the amount of heat stored in the Earth. Geysers, lava mountains and hot springs are all natural examples of geothermal energy.
