What would life on Earth be like if there wasn't a sun? Well, there wouldn't be any life. The sun is a very important abiotic factor (a non-living feature of an ecosystem that limits population size). First, the sun is essential during the process of photosynthesis, when plants make their own food. Without the sun, all plants would die. Many animals such as herbivores, omnivores and humans would perish without plants because they provide food and oxygen. The sun also creates a suitable environment for us to live in, not too hot or not too cold. It also regulates temperature, precipitation, air mass movement and radiation. These things are all vital to our life on Earth.
Picture take by JetsFan21
I got information from www.globio.org/glossopedia/article.aspx?art_id=37
http://wiki.answers.com/Q/Why_is_the_sun_an_important_abiotic_factor_for_all_organisms
www.biology-online.org/6/3_abiotic_factors.htm
