Earth's and Moon's Origin

What does the planetesimal theory propose about the moon's formation?

• The moon was captured by Earth's gravity from another solar system.

• The moon was created by volcanic activity on Earth.

• The moon formed after many collisions among planetesimals.

• The moon was formed from Earth's core.

Which theory suggests the moon formed from fragments expelled from a rapidly rotating Earth?

• Collision theory

• Fission theory

• Capture theory

• Planetesimal theory

Which of the following statements about the fission theory is accurate?

• It is one of the oldest theories regarding the moon's origin.

• It is widely accepted by scientists.

• It suggests that Earth never rotated fast enough to lose mass.

• It proposes that the moon was formed from Earth's core.

According to the capture theory, how did the moon come to orbit the Earth?

• It was formed from Earth itself.

• It was created by a collision with another planet.

• It formed far from Earth and was captured by its gravity.

• It was formed from debris left over from the solar system's formation.

What evidence do meteorites provide regarding the age of Earth?

• They suggest Earth is approximately 4000 million years old.

• They indicate that Earth formed 4650 million years ago.

• They show that Earth's core structure is similar to their composition.

• They prove that Earth is older than the moon.

How old do scientists estimate the Earth to be?

• 4650 million years

• 4500 million years

• 4700 million years

• 4000 million years

What is the significance of the oldest studied stones on Earth?

• They show the impact of meteorites on Earth's surface.

• They are 4650 million years old.

• They provide evidence of Earth's early atmosphere.

• They are 4000 million years old and help date Earth's formation.

What does the term 'cosmic dust cloud' refer to in the context of Earth's formation?

• The atmosphere surrounding the early Earth.

• The remnants of a supernova explosion.

• A collection of stars forming a galaxy.

• The material from which Earth condensed.

How did the Earth's atmosphere change over time?

• It became denser due to solar winds.

• It formed from gases released during volcanic eruptions.

• It was created by the photosynthesis of early plants.

• It remained constant since Earth's formation.

What is the primary source of gases that contributed to the formation of Earth's atmosphere?

• Volcanic eruptions

• Photosynthesis

• Meteorite impacts

• Solar winds