Hydrosphere and atmosphere. those are the only 2 spheres that interact with each other in the air.
Answer: Probably, harder the mineral it scratches. It makes more sense.
b. THE EARTH GETS CLOSER AND FARTHER FROM THE SUN
<h3>Questions: </h3>
What does a knickpoint indicate on a river profile
<h3>Answer: </h3>
A knickpoint is a steep section of a river's profile that can range in size from a single waterfall to a multi-kilometer high-gradient region.
