Radioactive elements inside the planet release heat now, but why was so much more heat released earlier in
Earth's history that is released now?

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

State one important difference between a physical change and a chemical change?

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.