Earth
What is the sediment left behind after a glacier moves through an area called?
Reveal Answer
Approximately what fraction of the Earth's air is made up of oxygen?
Reveal Answer
Which of the following does not form mineral crystals?
Reveal Answer
What magnitude did the largest recorded earthquake in the United States reach?
Reveal Answer
What family are both poison oak and poison ivy part of?
Reveal Answer
What does granite become when put under heat and pressure?
Reveal Answer
What type of power did the ancient Persians use to grind grains?
Reveal Answer
How many days a year is the sun invisible at the North Pole?
Reveal Answer
What is the name of a glacier that is formed when two or more valley glaciers flow together?
Reveal Answer
What type of rock forms from melted rock and comes to the surface to harden?
Reveal Answer
How many miles long is an average bolt of lightning?
Reveal Answer
What are solids contained in the gas that issues from a volcano called?
Reveal Answer
What process carries minerals down into lower soil horizons?
Reveal Answer