Early in the Earth's history, its surface was covered with an ocean of molten rock. Over time, the molten rock cooled to form a solid crust.

Of the following processes that can be observed today, which is most similar to the formation of Earth's early crust?

Argon, neon, and xenon are examples of

Give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.

Which of the following conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space? the cloud is extremely hot. the cloud is visible primarily because it reflects light from nearby stars. the cloud is cool and lies between you and a hot star. the cloud is cool and very dense, so that you cannot see any objects that lie behind it.