Any non-living factor that is used or present in an ecosystem
Common ones are sunlight oxygen nitrogen climate temperature pH levels and water
Ultraviolet radiation may increase when there is an increase in sunspots
Plants and other things that make food for themselves and use the sun to make food
The sun appears to cross the plane of Earth's equator
when it reaches either one of the "equinox" points in the sky.
the sun gives all living things there energy
