Pluto, Comets, Asteroids, and the Kuiper Belt

Which of the following is NOT a terrestrial planet?

• Mars

• Mercury

• Venus

• Jupiter

Why was Pluto reclassified as a dwarf planet?

• It is larger than Earth

• It is closer to the Sun than Neptune

• It has a tilted orbit

• It does not clear its orbit of debris

What is the Kuiper Belt?

• A cloud of dust surrounding the Sun

• A region of small icy bodies beyond Neptune

• A collection of asteroids between Mars and Jupiter

• A region of gas giants

What is the Oort Cloud?

• A spherical region of icy bodies far from the Sun

• A cluster of stars in the Milky Way

• A belt of asteroids

• A group of planets beyond Neptune

Where do comets originate from?

• The asteroid belt

• The surface of Mars

• The rings of Saturn

• The Kuiper Belt and Oort Cloud

What causes a comet's tail to form?

• Collisions with asteroids

• Magnetic fields of planets

• Radiation pressure from the Sun

• Gravitational pull from the Sun

What is the main reason asteroids in the asteroid belt did not form a planet?

• Lack of sufficient material

• Gravitational influence of Jupiter

• Too far from the Sun

• Presence of water

What is a meteor shower?

• A collision of two asteroids

• A group of stars falling

• A solar flare

• A trail of dust left by a comet

What is a meteorite?

• A meteor that burns up in the atmosphere

• A small asteroid orbiting the Sun

• A comet's tail

• A meteor that reaches the Earth's surface

What hypothesis suggests life might have originated from space?

• Steady State Theory

• Evolution Theory

• Big Bang Theory

• Panspermia Hypothesis