Earth: The Third Planet in Our Solar System

The video discusses the formation of the four rocky planets in our solar system, including Earth, which formed about 4.5 billion years ago. It explains that Earth will remain in its orbit until the sun becomes a red giant in approximately 5 billion years. Earth is highlighted as the only planet known to support life.

Which of the following is a characteristic of the rocky planets in our solar system?

• They have a solid surface.

• They are located beyond the asteroid belt.

• They have rings.

• They are primarily composed of gas.

Approximately how many billion years ago was Earth formed?

• 5.5 billion years ago

• 4.5 billion years ago

• 3.5 billion years ago

• 6.5 billion years ago

What is expected to happen to the Earth when the sun becomes a red giant?

• Earth will be consumed by the sun.

• Earth will develop rings.

• Earth will become a gas planet.

• Earth will move to a different orbit.

In how many billion years is the sun expected to become a red giant?

• 1 billion years

• 3 billion years

• 7 billion years

• 5 billion years

What makes Earth unique in our solar system?

• It is the closest planet to the sun.

• It is the largest planet.

• It has the most moons.

• It is the only planet known to support life.