Given that our solar system is now about 4.6 billion years old, when will we need to start worrying about the sun running out of hydrogen for fusion?

What causes climate change?

How does the slope of the land affects the speed of lava flow

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?

What causes earthquakes and valcanoes

Why is cattle the biggest raid for the global warming?

How are gems different from regular minerals? Regular minerals are less common than gems. Regular minerals are more durable than gems. Gems are more valuable than regular minerals. Gems are more malleable than regular minerals.

At which of the following sets of coordinates is the city of Lilongwe located? A. 25° S, 32° E B. 18° S, 47° E C. 13° S, 33° E D. 22° S, 17° E

The greek city states

How is the windward slope of a mountain range similar to the equatorial low-pressure zone?

13. The subatomic particle that contributes mass and a single positive charge to an atom is the a. proton b. neutron c. electron