Look up Dawrin's theory of evolution. Basically, fossil records show how life forms change over time through evolution.
C) Lactic acid and energy
This is the reason we feel a burning sensation during strenuous exercise.
Water's high heat capacity is a property caused by hydrogen bonding among water molecules. When heat is absorbed, hydrogen bonds are broken and water molecules can move freely. When the temperature of water decreases, the hydrogen bonds are formed and release a considerable amount of energy
In every energy transformation, some THERMAL ENERGY is released.
When you climb a rope, you change CHEMICAL ENERGY INTO KINETIC ENERGY.
In the muscles cells in your body, CHEMICAL ENERGY is changed into KINETIC ENERGY.
Energy can neither be created nor destroyed, because of this, energy usually remain constant but it can be converted from one form to another.
i just had to do this lol
