Water is a compound made up of two hydrogen atoms and one oxygen atom. Its chemical formula is H2O.

Greenhouse gases are gases that trap heat in the Earth's atmosphere. Carbon dioxide, methane, and water vapor are all greenhouse gases, while oxygen is not.

Jupiter is the largest planet in our solar system, with a mass that is more than twice the mass of all the other planets combined.

Electromagnetic radiation is a type of energy that travels in waves. Visible light, ultraviolet light, and infrared light are all types of electromagnetic radiation. Sound waves are not electromagnetic radiation.

The Pythagorean theorem states that in a right triangle, the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides.

The formula for the area of a circle is A = πr^2, where A is the area, π is a mathematical constant approximately equal to 3.14, and r is the radius of the circle.

The chemical symbol for gold is Au.

Hydrogen bonds are not a type of chemical bond. They are a type of intermolecular force.

Ganymede is the largest moon in our solar system, and it is even larger than the planet Mercury.

The formula for the volume of a sphere is V = 4/3πr^3, where V is the volume, π is a mathematical constant approximately equal to 3.14, and r is the radius of the sphere.

Quarks are not subatomic particles. They are elementary particles that make up protons and neutrons.

The gravitational force is the force that attracts objects to each other. It is the weakest of the four fundamental forces in nature.

Sound energy is not a type of energy. It is a type of wave.

Photosynthesis is the process by which plants convert sunlight into energy.

Amphibians are not a type of animal. They are a class of animals that includes frogs, toads, and salamanders.