Which instrument is used to measure humidity?

Which process allows a submarine to sink or rise by adjusting water in ballast tanks?

Which gland produces saliva to aid in the initial digestion of food in the mouth?

Which protective membranes cover and protect the brain and spinal cord?

Which everyday observation demonstrates Newton's Third Law of Motion?

Which everyday process best illustrates the conversion of chemical energy into mechanical energy?

Which scientific law explains that every object attracts every other object with a force proportional to their masses?

Which medical imaging technique uses high frequency sound waves to visualise internal organs?

Which vitamin acts as an antioxidant protecting cells from damage and is found in nuts and seeds?

Which layer of the Earth is primarily composed of molten rock?

Which planet in the solar system rotates on its side with an axial tilt of about 98 degrees?