Interactive

I learned a lot from this interactive website, a few things I learned about are carbon dioxide, oxygen, and the ozone layer. Here are a few facts i learned from this website. Carbon Dioxide makes up 1% of the Earth's atmosphere. This substance retains heat from the sun that escapes to the Earth. Solar energy bounces from the Earth to the Green House gasses and back down to Earth. Carbon Dioxide comes from volcanoes, automobile exhausts, power plants, decaying plants and animals and factories. When we burn fuel it lets out carbon dioxide. Mars and Venus have a lot of carbon dioxide on their planets.
4.6 billion years ago, the Earth had no oxygen, the Sun's ultraviolet radiation broke down molecules of water. The oxygen now comes from photosynthesis, meaning green plants use sun energy to change carbon dioxide and water into sugar and oxygen.
Oxygen gas accumulated in our atmosphere. Ozone (3 atoms of oxygen) was made in the stratosphere. Ozone is a shield to the Sun's ultraviolet radiation, living things could go from ocean to land. Chemical in aerosol sprays and refrigerants thinned ozone in the stratosphere in 1980. Mostly in Antarctica. UV radiation could go to Earth because of this. When these chemicals was banned, the hole grew no more. The hole is not expected to close in 40 to 50 years. Surface ozone can burn lungs of people and kids are the mostly affected by this.