- Earth formed billions of years ago
1. Scientists believe Earth formed when a cloud of gases and dust was pulled together by gravity.
2. As the cloud of dust spun around, small particles began to stick together.
3. Slowly, Earth became denser and bigger and it formed a planet.
- Earth has four layers
1. The largest layer is the mantle.
2. Earth’s outer core is 1300 miles thick.
3. The crust is the outer layer on the outside of Earth.
- Sometimes natural disasters occur on Earth
1. An earthquake occurs when two plates press against each other.
2. A volcano erupts when magma and gases push up from deep inside Earth.
3. Tsunamis are gigantic walls of water that crash onto land, causing destruction.
- There are ways that we can protect Earth and its resources for a better future
1. Conserve water and energy by turning off lights and faucets.
2. Keep the air clean by riding your bike or walking.
3. Recycle cans, bottles, and paper.
Parent Tip: Review the logic above to help your child master the concept of main idea and details foldable.
