Australia is the home of 95 percent of the world's diamond opal or ruby supply.

Why might ranchers not want to adopt wildlife-friendly practices

What is the name of the rover that recently explored mars?

Which of the following has not been domesticated? Select one: a. Goats b. Horses c. Water buffalo d. Lions The Second Agricultural Revolution is also called the: Select one: a. British Agricultural Revolution b. Green Revolution c.

If you were the current Governor of California, what measures would you enact to combat the current drought?

What are the four different cloud groups and how are they classified?

Most rivers have relatively gentle gradients in the headwaters and steep gradients in their downstream portions. True / False.

In which world region do hurricanes form? A. along the Equator B. near the poles C. only in the Atlantic Ocean D. only in the Pacific Ocean

What is the diameter of the geosphere

A major concern about increasing global temperatures is that a large portion of polar ice could detach and melt into the ocean.

Match the vocabulary word with its description. 1. produced from the sun biomass energy 2. produced by burning organic materials geothermal energy 3. produced from the heat inside the earth hydroelectric power 4.