4. Hot material in the Earth's mantle rises and cool material sinks. This is an example of

a. conduction
b. convection
c. radiation
d. none of these

Th answer is b. convection.

Explanation:

As the heat rises it cools down and it sinks and as the cold sinks it heats up so then it rises back up.

chemical energy is stored in the chemical bonds of atoms and molecules. it can only be seen when it is released in a chemical reaction. when chemical energy is released, the substance from which the energy came is often changed into an entirely different substance.

this chemical reaction releases energy in the form of light and heat. chemical energy is the potential energy stored in the arrangement of atoms within molecules. breaking chemical bonds requires energy, while forming new chemical bonds releases energy.

the atp molecule can store energy in the form of a high energy phosphate bond joining the terminal phosphate group to the rest of the molecule. in this form,energy can be stored at one location, then moved from one part of the cell to another, where it can be released to drive other biochemical reactions.

2b2t

explanation:

2b2t