What is the unit used to measure atmospheric pressure?

What is the hardest natural substance found on Earth?

Which human organ is primarily responsible for producing bile?

What is the boiling point of water at sea level in Celsius?

What causes the greenhouse effect on Earth?

Which gas do plants absorb from the atmosphere for photosynthesis?

What is the study of heredity called?

What is the pH value of pure water?

What type of lens is used to correct nearsightedness (myopia)?

Which organ in the human body is primarily responsible for filtering blood?

Which gas is commonly used in balloons to make them float?