Author Question: Why is the Grand Canyon an interesting landmark A) It is the smallest canyon in the world. B) It ... (Read 188 times)

ARLKQ · **on:** Jul 16, 2018

Why is the Grand Canyon an interesting landmark

A) It is the smallest canyon in the world.
B) It was created through a meteorite impact.
C) Thousands of dinosaur fossils have been found there.
D) It is a gorge that was eroded by a river about 1.7 billion years old and is about 1700 m deep.

Question 2

About a half of the United states energy comes from coal. Why could that be a problem?

A) Coal emits high CO2 concentrations.
B) Coal is very rare.
C) Coal is very expensive.
D) Coal is not found in the U.S., therefore we are dependent on foreign countries for our energy.