Florida Science Solar System

A ______________is the amount of time it takes for the Earth to revolve, or go around, the Sun.

• month

• year

• century

• decade

The force that keeps all objects near the Sun from flying off into space is

• gravity.

• magnitism.

• electrical.

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The path one space object takes around another space object is called

• a revolution

• a rotation.

• an orbit.

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The Earth rotates, or spins around on its axis, once every

• 27 days or one moonth.

• 365 days or one year.

• 24 hours or one day.

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The imaginary line that goes through Earth from pole to pole is called Earth's _______________________.

• equator

• axis

• orbit

Earth's day/night cycle is caused by Earth's

• orbit.

• revolution.

• rotation.

A ______________________________ is made up of a star and the planets and other space objects that revolve around it.

• galaxy

• universe

• solar system

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A large, round body that revolves around a star is called

• moon.

• comet.

• a planet.

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Objects made of rock and iron that orbit the sun in a wide region between Mars and Jupiter are called ____________________.

• dwarf planets.

• asteroids.

• comets.

A(n) ______________________________ is a chunk of frozen gases, rock, ice and dust.

• dwarf planet

• asteroid

• comet