Which moon of Jupiter is the largest moon in our solar system and even larger than the planet Mercury?

What is the main function of the kidneys in the human body?

Which law of thermodynamics states that heat energy always flows from areas of higher temperature to areas of lower temperature?

Which of the following is a greenhouse gas?

What is the chemical symbol for helium?

What is the chemical formula for sodium hydroxide?

What is the chemical formula for hydrochloric acid?

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

In the periodic table, which group do alkali metals belong to?

According to the law of conservation of momentum, what happens to the total momentum of a system of objects if no external force acts on it?