2) A. continental-continental crust collisions.
5) A. heating up of the mantle by the Earth's core.
6) C. Geosphere and Atmosphere.
7) B. They are formed by the movement of Earth plates.
9) B. atmosphere and hydrosphere.
10) C. P represents combustion and Q represents decomposition.
The velocity of a stream usually increases downstream. The gradient (slope) of the stream typically decreases but gravity, elimination of bed roughness and an increase in the amount of water from the entry of tributaries tends to increase the velocity.
Air resistance because to act on an object, it must touch it
Trees produce oxygen in order for us to breathe. if we cut them down there is less oxygen for us.
in an area of wildlife many different animals survive off of trees. cutting down the trees could lead to the extinction of specific animals.
