Lunar and solar eclipses are irregular and therefore cannot be predicted with any accuracy.

a. True

b. False

Which of the following geological processes adds new rock to the surface of the earth? A) Volcanic activity B) Glacial activity C) Soil erosion D) Weathering

These cliffs found off the coast of Ireland were formed from limestone deposits, as the Earth's sea level rose and dropped over millions of years.

Use an example to explain why economists measure a country's economic development by its GDP per capita rather than its total GDP.

The separation of the Earth into layers was the result of the: A. presence of water at Earth's surface. B. initial collection of materials and their position in Earth. C. decrease in temperature downward toward the core. D.

Which conclusion can be drawn from the graph data? Mexican cities have larger populations than US cities. The third most-populous city shown on the graph is in Mexico. The top three most-populous cities shown on the graph are US cities.

Which types of stars have extremely intense gravitational and magnetic fields?

What happened in Russia as a result of actions taken by Peter the great

At independence, the most prosperous country of former French Western Africa was A. Chad B. Senegal C. Côte d'Ivoire D. Benin

Why is mexico city the capital of mexico?

Why do deserts form around areas near the tropics but not the equator