The answers are:
1. D
2. B if it is a check all that are true it is b & d
I’m not sure, but I think A. from an internal engine reservoir
Weathering breaks down rock and other material
<span>The first method to determine the chemical composition of a substance in space was using light. By determining red shift in the observed spectrum of light they could determine the elements they were observing. Different elements change the way light behaves and from this scientists can determine the makeup of things such as stars and nebulas.</span>
