The Moon (Our Solar System Sub-Unit)

What is the approximate ratio of the Moon's diameter to Earth's diameter?

• Half

• One-quarter

• One-eighth

• One-sixteenth

What two factors contribute to the Moon illusion, making the Moon appear larger on the horizon?

• Atmospheric refraction and light scattering.

• How we perceive the sizes of objects and how we perceive the sky.

• The Moon's actual change in size and Earth's rotation.

• Gravitational lensing and optical distortion.

According to the Giant Impact Hypothesis, what caused the formation of the Moon?

• A large asteroid was captured by Earth's gravity.

• A Mars-sized planet collided with early Earth.

• Volcanic eruptions on Earth ejected material into orbit.

• Debris from the early solar system gradually coalesced.

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What was the initial state of the Moon after its formation, and how did Earth influence its crustal development?

• It was molten and far from Earth, leading to a uniform crust.

• It was solid and close to Earth, causing a thinner near-side crust.

• It was molten and close to Earth, with Earth's heat causing a thicker far-side crust.

• It was solid and far from Earth, resulting in a thicker near-side crust.

What was the primary cause of the Moon's highland cratering and the formation of maria?

• Volcanic eruptions and tectonic activity.

• Intense collisions with comets followed by lava flows.

• Erosion by ancient lunar rivers.

• Gravitational pull from Earth causing surface deformation.