What object did Ptolemy claim was at the center of the universe

Some of Earth's tectonic plates are located under oceans. A sudden movement of such tectonic plates can be thought of as an underwater earthquake. This kind of event can cause a large amount of water to be moved. This is one way that tsunamis form.

A regulation basketball is about 23 cm in diameter. If the basketball was a model Earth, what size sphere would make an appropriate Moon to accompany the basketball, and how far apart would the two balls be?

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then:

What causes the soils in former rain forests to deplete so quickly after they are used for farming? frequent rain hot temperatures reforestation slash-and-burn techniques

Which mineral property describes how minerals interact with light? cleavage luster streak

Explain why a baseball would go higher if it were thrown up from the surface of the Moon than if it were thrown up with the same velocity from the surface of Mars?

The arid expanse covering north africa is called

How did technology lead to geographic expansion and growth of cities in the midwest

What are living things use in water

What can teacher asks about Canada?