Solar System Formation & Inner Planets

How old is our solar system?

• 4.6 billion years
• 13.8 billion years
• 6,000 years
• 15,000 years

Tags

NGSS.MS-ESS1-4

A celestial cloud of dust and gas is called . . .

• nebula
• supernova
• accretion disc
• bombardment

What caused the solar nebula to contract and spin?

• a supernova
• an asteroid impact
• radiation
• random motion

Tags

NGSS.MS-ESS1-2

Smaller particles collecting together into larger and larger objects is called . . .

• accretion
• contraction
• explosion
• rotation

Why is Mercury covered with craters, but Earth is not?

• Earth's atmosphere protects and weathers
• Earth's moon blocks asteroids
• asteroids just missed Earth
• most asteroids land in Earth's oceans

When the inner planets (and moons) were bombarded by asteroids, what did the asteroids leave behind?

• craters
• calderas
• mountains
• valleys

Tags

NGSS.MS-ESS2-2

The Nebular Theory is:

• A theory on how the Milky Way galaxy was formed
• A theory on how the universe was formed
• A theory on how the solar system will be destroyed
• A theory on how the solar system was formed

A nebula starts to collapse because of:

• A nearby star shining it's light
• A passing spaceship
• A passing comet
• Gravity

Tags

NGSS.MS-ESS1-2

The group of inner planets are known as:

• The Terrestrial Planets
• The Gas Giants
• The Outer Planets
• The Hallow Planets

The planetesimals keep:

• Colliding and breaking apart
• Colliding and sticking together
• Colliding and bouncing around
• Breaking down into smaller pieces