Answer:
Erosion, where the Colorado River would erode through the ground, exposing layers of earth
Answer:
Visible light from the Sun
Explanation:
The visible light is known to be a portion of the electromagnetic spectrum that can be seen with naked eyes. It is a form of electromagnetic radiation.
Other forms of the electromagnetic radiation are the infrared and ultraviolet.
The visible light is found or falls within the range of electromagnetic radiation spectrum between the infrared and ultraviolet.
Among the electromagnetic radiation, the visible light is the portion that supplies the energy which warms the earth's surface.
They may have small crystals
The environment on mars is dry and is not suitable for life
