Water is made up of hydrogen and oxygen.

The Sun is a planet.

The Earth is flat.

Plants make their own food through photosynthesis.

An atom is the smallest unit of matter.

Blood is red because of hemoglobin.

The speed of light is faster than the speed of sound.

Humans can survive without oxygen.

Electrons have a positive charge.

Sharks are mammals.

The chemical symbol of oxygen is O₂.

Lightning is hotter than the surface of the Sun.

Blood cells are made in the heart.

Spiders are insects.

Metals usually conduct electricity.