Why is East Africa often called the "cradle of humanity"?

Why is a nation important

Air, water, and ice can break rocks into tiny fragments. Which of the following best describes this process?

In which of the following climate zones do giant pandas live? a. the tundra b. the highlands c. the coniferous forest d. the deciduous forest

The card showing the earliest event was placed on the extreme left

The Peninsular terrane is now part of the crust of North America in southern Alaska. The dominant rock type in this terrane is intrusive igneous rock that ranges in composition from gabbro to granite and volcanic rock with a similar compositional

Solar energy has been used economically for many years to

What country is opposite the United States on the earth

What are the main ethnic groups in the United States and their percentage of the population? What languages are spoken in the United States, and what are those percentages?

Submersible used to study the deep oceans

Which planet has an atmosphere that demonstrates the extreme nature of the greenhouse effect? a. mars b. earth c. venus d. mercury