Dwarf Planets and chapter review

Which of the solar system objects is the largest?

• Jupiter

• Neptune

• the Sun

• Saturn

Which best describes the asteroid belt?

• another name for the Oort cloud

• the region where comets originate

• large chunks of gas, dust, and ice

• millions of small rocky objects

Which describes a planet's speed as it orbits the Sun?

• It constantly decreases

• it constantly increases

• it does not change

• it increases then decreases

Which describes the greenhouse effect?

• effect of gravity on temperature

• energy emitted by the Sun

• energy trapped by atmosphere

• reflection of light from a planet

How are terrestrial planets similar?

• similar densities

• similar diameters

• similar periods of rotation

• similar rocky surfaces

Which inner planet is the hottest?

• Earth

• Mars

• Mercury

• Venus

Which two gases make up most of the outer planets?

• AMMONIA AND HELIUM

• Ammonia and hydrogen

• Hydrogen and helium

• Methane and hydrogen

Which is true of the dwarf planets?

• more massive than nearby objects

• never have moons

• orbit near the Sun

• spherically shaped

Which is a bright streak of light in Earth's atmosphere

• a comet

• a meteor

• a meteorite

• a meteoroid

Which best describes an asteroid?

• icy

• rocky

• round

• wet