What type of mountain is formed by the folding and uplift of rock layers along tectonic plate boundaries?

What is the name of the process by which a substance changes directly from a solid to a gas without passing through the liquid phase?

Which of the following is a function of the liver?

Which type of galaxy has a flattened disk structure with spiral arms and a central bulge?

What is the process by which rocks are broken down into smaller particles over time?

What is the function of the endocrine system in the human body?

What is the chemical symbol for gold?

What layer of the Earth's atmosphere contains the ozone layer?

Which of the following is a greenhouse gas?

What is the term for a point in space where gravity is so strong that nothing, not even light, can escape?