Formation of the Solar System

Which of the following are the closest to the sun?

• terrestrial planets
• gas giant planets

The main force at play during making of our solar system

• strong force

• weak force

• gravity

• electrostatic force

How old is our solar system?

• 4.6 billion years old
• 4.6 million years old
• 9 billion years old
• 4.5 million years old

A cloud of gas and dust from which bodies in space are formed

• photosphere
• nebula
• solar flare
• Sunspot

Sometimes I am called a "dirty snowball". I have a hydrogen cloud, coma, and a nucleus. I am invisible except when near the sun. What am I?

• Asteroid
• Star
• Meteor
• Comet

Where are asteroids found?

• between earth and venus

• between Jupiter and Saturn

• between Saturn and Uranus

• between Mars and Jupiter

What do the outer planets have in common?

• They are much larger than Earth and are made mainly of Hydrogen and Helium

• The are about the same size as Earth and are mostly made of Hydrogen and Helium

• They are must larger than Earth and are mainly made of iron

• They are the same size as Earth and are mainly made of iron

Which of the following describe the size of our sun? (select all that apply)

• Medium Sized

• 835,000 miles across

• A neutron star

• A very massive star

A massive explosion of a star is called . . .

• supernova
• nebula
• pulsar
• black hole

What is the closest planet to the Sun?

• Mercury
• Mars
• Venus
• Earth