I have 2 questions: What is the primary difference between weathering and erosion?
Select one:

a.
Weathering causes a rock to weaken so that erosion can then break it apart

b.
Weathering is the breaking down of rock; erosion is the moving of rock

c.
Erosion is the scraping of rock; weathering is the breaking

d.
Erosion is the breaking down of rock; weathering is the moving of rock

2:
As surface area increases, the rate of increases.

Mexico city is an example of how humans alter their environment because it was a. one of the world’s largest cities b. built on drained and filled lake beds c. built after conquest by the spanish d. once the capital of the aztec empire

Most tornadoes carry winds speeds in a range of km per hour

To solve this system of equations by elimination, what operation could be used to eliminate the y-variable and find the value of x? 6x + 5y = 2 4x + 2y = 8 a) subtract 2 times the second equation from 3 times the first equation b) subtract 3 times the second equation from 2 times the first equation c) subtract 5 times the second equation from 2 times the first equation d) subtract 2 times the second equation from 5 times the first equation