A map serves two purposes: It is a tool for storing reference material and a tool for communicat- ing geographic information. route between two places and to avoid getting lost along the way.
Answer:
The color is considered dark if the rock appears as a dark gray to black (pyroxenes, the amphibole Hornblende, the mostly Ca-plagioclases near Anorthite, and Biotite mica. Density is a property that is proportional to the composition of the rock. The higher the amount of silica (felsic) the less dense the rock will be.
Explanation:
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Answer: 1) Angular separation equals 0.0000031 degrees
2) Angular separation in arc -seconds equals 0.011156"
Explanation:
For 2 stars separated by a distance 'S' and at a distance 'D' from the earth the angular separation in radians is given

Applying values we get

Now we know that 'π' radians equals 180 degrees thus the above value in degrees shall be equal to

2)
The angular separation in arc- seconds is given by

A volcanic explosion, a rising mass of salt, and a large meteor impact were all explanations put forward to explain how meteor crater formed.
A crater is a bowl-shaped depression or hollow area formed by a meteorite impact, volcanic activity, or an explosion. Impact craters form when objects such as asteroids and meteorites collide with larger solid surfaces such as planets and moons. Craters form when solids collide at super-velocity, no matter how hard they are.
Instantly evaporates, creating a huge shockwave on the ground that melts and recrystallizes rock. All that's left is a large circular hole in the ground and some very crumbling rocks. Volcanic activity often creates craters. Some volcanic craters are deep and have steep sides while others are wide and flat.
Know more about craters here
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