FORMATION OF SOLAR SYSTEM

A nebula is:

• A cloud of ice
• A cloud of dust and gas
• A cloud of just gas
• A cloud of just dust

The most abundant gases in a nebula are:

• Hydrogen & Oxygen
• Nitrogen & Oxygen
• Hydrogen & Helium
• Oxygen & Helium

A nebula starts to collapse because of:

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

As a nebula collapses it also begins:

• Expand
• Rotate
• Shake
• Turn to ice

A nebula collapses down into a disk known called:

• A compact disk

• An irregular cloud

• An accretion disk

• An circular disk

What forms in the very center of the accretion disk?

• A protostar or early star

• A planet

• A protoplanet

• A planetesimal

What is forming in the accretion disk away from the center?

• Light

• Protostars

• Planetismals or early planets

• Hydrogen

The group of inner planets are known as:

• The Terrestrial (rocky)Planets

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

The group of outer planets are known as:

• The Terrestrial Planets
• The Gas Giants
• The Inner Planets
• The Rocky Planets

How long ago did these nebular processes start?

• 4.6 years ago
• 4.6 light years ago
• 5.6 billion years ago
• 4.6 billion years ago