What is the main driver of surface ocean currents?

Which law states that the total electric charge in an isolated system is constant?

Which space telescope is set to succeed the Hubble Space Telescope and is designed to observe the universe in infrared wavelengths?

What is the chemical symbol for sodium?

In the human respiratory system, what structure prevents food from entering the trachea during swallowing?

What is the term for the point in a planet's orbit where it is farthest from the Sun?

What is the SI unit of power?

What is the primary gas in Earth's atmosphere?

Which element is present in all organic compounds?

What is the name of the galaxy that contains our solar system?