Petroleum is a fossil fuel formed from the remains of ancient marine organisms.
What is the term for the process by which a river wears away the land and carries sediment downstream?
What type of rock is formed from the cooling and solidification of molten magma?
Which of the following is a function of the hypothalamus in the human brain?
What is the primary source of energy for the Earth's climate system?
What is the name for a long, narrow body of water that connects two larger bodies of water and is often deeper than a strait?
What is the largest planet in our solar system?
What is the purpose of the circulatory system in the human body?
What is the powerhouse of the cell, responsible for energy production?
Which of the following blood vessels carries oxygenated blood from the lungs to the heart?
What is the closest star to Earth?