The slopes of most cinder cones are usually about 30 degrees because that is the angle of repose, which is the slope at which the loose cinder can stand in equilibrium.
The cinder cones vary significantly in height, from just a few meters of height to few hundred meters.
They are numerous around any volcano, and lava can come out of them or may flow below them.
Answer:
Mineral A is harder than Mineral B
If Mineral A scratches mineral B, it is sharper and harder, because mineral A scratches Mineral B, not Mineral B scratching Mineral A.
The answer is the first option. Hope it helps!
Answer:
B
Explanation:
I just answered the question and it was CORRECT.
Answer and Explanation:
Student B is correct, because Mercury is, in fact, possible to be visualized during the morning or evening twilight, that is, just after sunset, or just after sunrise, as times are necessary for the planet earth it has the right lighting to visualize it.
Student C is the one that is most incorrect, because at midnight the planet earth has very low luminosity so that Mercury can be visualized. Since it needs a low illumination, however existent for the planet Mercury to be seen.
