A process called electrolysis can separate water into hydrogen gas and oxygen gas. Another process is being developed which can extract oxygen from rocks and soil that contain it. Do you think these processes could be useful on the Moon? How?

A presidential candidate must live in the united states for at least 9 years before running for president. true of false

Which of the following is NOT a true statement about the Inca? A) They conquered the Maya B) They had a highly organized military C) They mummified deceased royal-family members D) They built cities and fortresses on the highlands of the Andes

What two countries fought several wars between them in their history?

In a short paragraph, explain the various waves of immigration to the United States. What groups were part of each of these waves?

Which of the following is a weather pattern created by a strong El Niño

The most common economic system in the world is a closed economy command economy mixed market economy traditional economy.

Is the new crust being formed denser than the older crust?

The leading edge of a thunderstorm's cold downdraft is known as a:

Which location is not a continent? a. The Artic b. South America c. Europe d. Asia

The amount of heat required to raise the temperature of 1 kg of a substance by 1°C is the definition of which term?