Formation and Characteristics of Earth

How many species are estimated to exist on land and in the ocean on Earth?

• 7 million on land and 3 million in the ocean

• 6.5 million on land and 2.2 million in the ocean

• 6 million on land and 2 million in the ocean

• 5 million on land and 1 million in the ocean

What event is believed to have triggered the formation of the solar system?

• The gravitational pull of a black hole

• The merging of two galaxies

• A nearby star's explosion causing a shock wave

• A collision with a large asteroid

During the Hadean Eon, what was a significant characteristic of Earth?

• It was inhabited by dinosaurs

• It experienced high volcanic activity

• It had a stable climate

• It was covered in ice

According to the giant impact hypothesis, how was the Moon formed?

• From volcanic eruptions on Earth

• From the accumulation of space dust

• From a collision with a planet-sized body

• From a captured asteroid

What is the significance of Earth's distance from the Sun?

• It makes Earth the largest planet

• It causes extreme temperatures

• It results in constant daylight

• It allows Earth to sustain life