What causes a comet's tail to form?

solar wind

entering Earth's atmosphere

reflection of light from the moon

impact with a planet

Which of the following factors did NOT contribute to the westward expansion of the U. S.? decreased immigration the Cold War the desire for land, wealth, and adventure the discovery of gold the Homestead Act increased immigration the Revolutionary

The process of an oceanic plate colliding with and descending underneath a continental plate

Today, dairy farms are found in every American state and many Canadian provinces due to

Explicar la relación entre la latitud y el clima

Why is English the official language in Nigeria? A. Because English is easier to read and write than many African languages B. Because Great Britain still governs Nigeria C. Because of the influence of colonial rule D.

Is argentina in the northern or southern hemisphere?

How does earths revolution affect our view of stars and constellations in the night sky?

The reason why the USA seems to have so many products that are "Made in China" is because Chinese businesses are very involved in world trade. Which means Chinese businesses are

Which of the following is not a place where hydrogen can be found on Earth? A. Natural gas well B. Atmosphere C. Water D. Mine

Molten lava coming out of a Hawaiian volcano cools down and forms rock. Which statement best describes the flow of energy in this scenario? Energy moves from the surroundings to the lava. Energy stays within the lava.