Luna

The Moon, Earth's only natural satellite, lacks an atmosphere and has gravity that is one-sixth of Earth's. It is the largest satellite relative to the planet it orbits in the solar system. The Moon likely formed from a collision between Earth and a small planet-sized object around the same time as Earth.

What is a notable characteristic of Earth's natural satellite compared to Earth?

• It is closer to the Sun than Earth.

• It lacks an atmosphere.

• Its gravity is stronger than Earth's.

• It has a thicker atmosphere.

How does the gravity of Earth's natural satellite compare to that of Earth?

• It is twice as strong.

• It is 1/3rd of Earth's gravity.

• It is equal to Earth's gravity.

• It is 1/6th of Earth's gravity.

Relative to the planet it orbits, how is Earth's natural satellite described?

• The smallest satellite in the solar system.

• The largest satellite in the solar system.

• The fastest orbiting satellite in the solar system.

• The most distant satellite in the solar system.

What event is believed to have led to the formation of Earth's natural satellite?

• A volcanic eruption on Earth.

• A collision between Earth and a small planet-sized object.

• The cooling of Earth's surface.

• The gravitational pull of the Sun.

When did Earth's natural satellite likely form?

• Long after Earth was formed.

• During the last ice age.

• Around the same time as Earth.

• Before Earth was formed.