the sun is our main source of energy as it provides heat and light energy,plants use the light energy and take in co2 to make food,which we consume,but is dependent on the plant.
The sun and the sunlight are the main things for all living things.
i think that it is a secondary source because it dosen't look like that person who drew it was there
i think they are a primary source.... yes it is a primary source
The primary source of energy for almost all food chains is the sun. The usual series is that the sun provides energy to plants that provide to other creatures. Some ecosystems rely on other energy sources however. For instance some deep ocean ecosystems rely on geothermal energy harvested by bacteria.
In my personal opinion, it would be a second source,
i think secondary source
why do you think coal is the most energy source we are going to use in the future
Primary source because a primary source is from the past/something from someone whose been in that time but a secondary source is something from us/people who have not been in that time, and its also what we think happened then.
no it is not. i think...
A primary source would be a picture from that time. Or something like a diary. I think Davey Crockett had a diary of what happened.
The Earth's Iron Core
Why did the author write this