Earth is the third planet from the sun, unique for its ability to support life. It formed 4.5 billion years ago and is the fifth largest planet in the solar system. Earth orbits the sun in an oval path, causing seasonal distance variations. It rotates every 24 hours, creating day and night. Earth's surface is dynamic, with tectonic plates forming continents over time. Oceans cover 71% of the surface, providing essential water for life. The atmosphere, rich in oxygen, protects life and regulates weather. Earth is perfectly positioned in the solar system, making it the 'Goldilocks planet' where conditions are just right for life.

What is the shape of Earth's orbit around the sun?

• A triangle

• A perfect circle

• A square

• An oval

What are tectonic plates responsible for?

• Producing oxygen

• Generating weather

• Forming mountains and ridges

• Creating oceans

What percentage of Earth's surface is covered by saltwater oceans?

• 50%

• 71%

• 80%

• 60%

Why is Earth the only planet in our solar system that supports life?

• It is closest to the sun

• It has liquid water and an atmosphere

• It is the largest planet

• It has a solid core

What role does Earth's atmosphere play in supporting life?

• It provides gravity

• It generates sunlight

• It creates tectonic plates

• It protects from space and regulates temperature

Why is Earth referred to as the Goldilocks planet?

• It is too hot

• It is too cold

• It has conditions that are just right for life

• It is the largest planet

What would happen if Earth were closer to the sun?

• It would be too hot

• It would be too cold

• It would have more water

• It would have less gravity