Answer:
a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.
Explanation:
The thinnest layer of the sun is the corona
Answer:
B, D, and E
Explanation:
First, the formula for the area of a circle is 

Since pi is equal to 3.14, all we need is the radius squared. Since your radius is 12,
=144. Therefore, your equation for <em>area</em> will be (3.14)(144), answer B.
Second, the formula for the circumference of a circle is
.
So, 2(3.14)(12), answer D.
Edit: Answer E also says the same as above- it just multiples the 2 and the 12 together. Sorry for the initial error!
True. At a steeper gradient the velocity of the river is greater, combined with more discharge in the river the ability of the river to transport load increases as it has more energy.