Earth’s early atmosphere was made of various gases that were unsuitable for life on earth. match the following elements with how they ended up in the current atmosphere.

oxygen : produced through photosynthesis

carbon dioxide : released by volcanoes

lighter gases : escaped into space

heavier gases : sank to the surface

Explanation:

at the beginning of the formation of the earth the atmosphere of the earth was so different from our atmosphere now . The earth was just melting ball full of hydrogen and helium gases only , after it started to be cooler and more sold the volcanoes erupted  and released carbon dioxide and water vapor and nitrogen. and a type of a small bacteria used the radiation or the light of the sun and process of  photosynthesis and produce  oxygen , also the radiation of the sun breaked the molecule of water which consist of H2O and give more free Oxygen and the hydrogen and light gases started to escape into space, and the heavier gases sank to the surface

c is the answer because when something is left after something evaporates that shows the chemical change.