Here is a scale model of a fountain at a museum. The scale is 1:30.
How many boulders are in the real fountain?

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

What is one energy transformation that is taking place in the photo? radiant energy to thermal energy thermal energy to nuclear energy chemical energy to thermal energy radiant energy to chemical energy