Describe events or processes that created the earth today

Global Warming: Global warming is a gradual increase in the Earth's temperature over time.

Greenhouse Effect: The greenhouse effect causes the Earth to be colder than usual,and the gases polluting the air build up and form a thick layer of substances which trap the sun's radiation.

Gases: Certain gases such as Carbon Dioxide, CFC's and many more, cause the Earth to become warmer.

Littering: Littering pollutes the Earth's air, making a build up of gases stronger, which could lead to the temperature's rising too high in the near future.

Photosynthesis: Photosynthesis is a process where plants use a process of water and carbon dioxide to make food, and to grow and release oxygen into the Earth's atmosphere.

Hope this helps! x

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).