What causes plate tectonics?

1. Friction by convective cells in the mantle2. Gravitational sliding3. Slab pull

Explain the differences between the Ptolemaic view of the universe and the new vision of the universe proposed by Nicolaus Copernicus. Read the following excerpt from Galileo: ...

What river begins in the andes mountains in flows eastward across south america to the atlantic ocean?

In what type of climate do trees produce narrower rings? cool and dry warm and wet cool and wet warm and dry

Herbicide rollers can be effective for controlling low growing brush in areas where spraying is not possible because of the proximity of sensitive crops. True or False?

When correlating rock between widely separated areas or between continents, what feature do geologists rely on the most?

What percentage of water vapor is found in the air? a. 0 to 1 percent b. 0 to 4 percent c. 0 to 8 percent d. 0 to 10 percent

In triangle ABC m∠A 25 m∠b = 55 and c=25 find b round your answer to the nearest tenth A. 10.7 B. 12.9 C. 48.5 D. 20.8

Magma that reaches earth surface and flows from volcanoes

The gray wolf is a predator that keeps the herd numbers of elk and deer populations in check. With the disappearance of wolves, elk and deer populations exploded, which led to overgrazing of plants, especially in riparian zones.

What physical characteristics make the Midwest particularly good for farming?