Identify and describe one natural and one man made source of carbon in the carbon cycle?

haploid cells;

the growth of the plants is affected by the heat of the light. what is the student doing?

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.