When was school invented

Bubba wants to determine a mineral's hardness because he loves them so much. He can scratch the mineral with an iron nail but cannot scratch the mineral with a penny. What is the approximate hardness of Bubba's mineral? A. Less than 2.5. B. 4.5 to 5.

Crust is recycled when two continental plates collide. Is this statement true or false?

Southeast Asia is located on the equator, which means almost the entire region falls within the humid tropics. Question 2 options: a. True b. False

How did the Haitian revolution affect sugar production?

There are two different species of toads which are separated by a hot and dry valley, and fossil evidence indicates that these two species share a common ancestor. What would have caused these two species to evolve?

The greatest temperature ranges in the region, due to the effect of continentality, are experienced in?

Question 1 Why can't Mars have liquid water? Why can't Venus?

Which of the following is not a convergent boundary A. Continental Volcanic B., Oceanic Oceanic C. Continental Continental D. Oceanic Continental

Which of the item (s) below are true about acid rain? 1. Acid rain affects our health. 2. Acid rain increases precipitation. 3. Acid rain increases the world's food supply. 4. Acid rain is of greater concern in more-developed countries. 5.

Why can minerals that form early in fractional crystallization grow distinct crystal shapes?