Introducing the Solar System

What did our Solar System form from?

• a rainstorm

• a cloud of hydrogen, helium, rock, ice, and other materials

• air and clouds

• paper, glue, and tape

What makes up our solar system?

• the sun

• the planets and their moons

• variety of smaller objects

• all of these things

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The solar system formed as__________ pulled together rock, gas, ice and other materials.

• inertia

• planetisimals

• gravity

• Newton's first law of motion

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When was the solar system formed

• 4.6 million years ago

• 46 years ago

• 46 days ago

• 4.6 billion years ago

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The second planet from the sun is

• Venus

• Earth

• Neptune

• Mars

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The sun, the planets and their moons, and a variety of other objects make up the

• planet system

• astronomical unit

• solar system

• galaxy

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This unit of measurement is used to measure distance within the solar system

• miles

• astronomical unit

• kilometers

• distance unit

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An object that orbits the sun, is spherical, but has not cleared the area of its orbit

• dwarf planet

• planetesimal

• asteroid

• planet

Most of the solar system (about 99.85 percent of the mass of the solar system) is contained within the

• asteroid

• planet

• planetesimal

• sun

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one astronomical unit (AU) is equal to the average distance between

• the sun and Mars

• Saturn and Neptune

• the sun and Earth

• the sun and Pluto

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