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How did space rocks like comets and asteroids initially form?

• They were created directly by the Big Bang.

• They formed from the remnants of exploded planets.

• They are pieces of planets that broke off due to impacts.

• They formed from energy and mass pulled together by gravity, but did not coalesce into planets.

What is the current size range for objects classified as asteroids?

• From a grain of dust to 3 feet in length.

• From 3 feet to 590 miles in diameter.

• From 590 miles to the size of Earth's moon.

• Any size, as long as they are rocky bodies in space.

What is the primary reason Earth is not frequently hit by large asteroids?

• Earth's strong magnetic field deflects them.

• The Moon's gravitational pull captures most of them.

• The gravitational forces of Mars and Jupiter corral most asteroids in a belt.

• Asteroids are generally too small and too far away to pose a threat.

What happens to a meteoroid when it enters Earth's atmosphere?

• It becomes a meteorite upon impact with the ground.

• It is reclassified as a meteor and burns up, creating a flash of light.

• It typically breaks into smaller meteoroids and continues to orbit Earth.

• It transforms into a comet due to atmospheric friction.

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What distinguishes a meteorite from a meteor or meteoroid?

• Meteorites are larger than meteors or meteoroids.

• Meteorites are made of ice, while meteors and meteoroids are rock.

• Meteorites are space rocks that have survived atmospheric entry and landed on Earth.

• Meteorites orbit the Sun, while meteors and meteoroids orbit planets.

Why are meteorites considered valuable?

• They are extremely common and easy to find.

• Their unique colors make them popular collectibles.

• They provide a window into the creation of the universe and are rare.

• They are primarily composed of precious metals.

What is the primary composition of a comet?

• Solid rock and metal.

• Ice, water, and dust.

• Molten rock and gas.

• Pure metallic elements.

Which type of space rock is considered the most dangerous in terms of planetary destruction?

• Comets

• Meteors

• Meteorites

• Asteroids