Which of the following is an example of a first-class lever?

Which part of the human digestive system is responsible for nutrient absorption?

Which of the following is a measure of the total amount of dissolved salts in water, often used to determine water salinity?

Which of the following is an example of a convergent plate boundary?

What is the law of reflection for light?

What is the function of the thymus gland in the immune system?

Which of the following is an example of a polymer?

According to Newton's third law of motion, if object A exerts a force on object B, what is the reaction?

Which of Newton's laws states that an object at rest will stay at rest, and an object in motion will stay in motion with the same speed and in the same direction unless acted upon by a net external force?

Which of the following is a greenhouse gas that is more potent than carbon dioxide but less abundant?