Key learning points

1. The round Earth is covered with water and land, and above that is the atmosphere.
2. We use models, called globes, and photographs taken from space to think about what the world is like.
3. Most of the surface of the world (over 70%) is covered with water, which is why Earth is known as the Blue Planet.
4. The colours on a globe or satellite image give us information, such as whether it’s land or ocean.

Keywords

• Ocean - An ocean is a very big area of salt water between the continents.

• Land - Land is any part of Earth's surface that is not covered by water.

• Atmosphere - The atmosphere is the layer of gases that surrounds Earth. It includes the oxygen we need to breathe, so it is essential for life on Earth.

• Planet - A planet is a large round object that travels around a star in space.

• Satellite - A satellite is an object in space that orbits or circles around a bigger object in space. These an be natural like the moon or artificial ones like the International Space Station.

Common misconception