Formation of our Solar System

Formation of our Solar System & Review

Multiple Choice

Which of the following is the correct order of the objects from largest to smallest?

• sun, solar system, Milky Way, universe

• universe, Milky Way, solar system, sun

• Milky Way, sun, solar system, universe

• solar system, universe, sun, Milky Way

Multiple Choice

If a star is 27 light years from Earth, when we look at it in the night sky we are actually seeing it ___________ _______ ago because it takes that long for the light to reach us.

• 27 minutes

• 27 days

• 27 years

• 27 times of playing Stairway to Heaven on repeat

Multiple Choice

Any object with mass has gravity.

• True

• Sometimes

• False

• Never

Multiple Choice

As distance between two objects increase the pull of gravity 

• Increases

• Decreases

• Stays the same

Multiple Choice

Two factors effecting the magnitude of the force of gravity between 2 objects are...

• mass and distance 

• mass and matter

• distance and weight 

• weight and mass

Multiple Choice

Which system has the greater gravitational attraction between the two objects (if any)?

• System A

• System B

• Same gravitational attraction fro System A and System B

Multiple Choice

What is the period of rotation?

• How long it takes a planet to orbit the sun

• How fast a planet orbits the sun

• How fast a planet spins

• How elliptical a planet's orbit is

Multiple Choice

What is the period of revolution?

• How long it takes a planet to orbit the sun

• How long it takes a planet to spin around

• How fast a planet spins

• How elliptical a planet's orbit is

Multiple Choice

Kepler's 2nd Law states that a planet's velocity (speed and direction) is ____ when farther from the sun.

• fastest

• slowest

• unchanged

• the same

Multiple Choice

If a planet is closer to the sun, its orbit will be _____ than one farther away. 

• longer

• slower

• bigger

• shorter

Multiple Choice

A person would weigh less on the moon than on the Earth because...

• the moon has less mass, and therefore less gravity

• the moon has more mass, and therefore less gravity

• the moon has less mass, and therefore more gravity

• the moon has more mass, and therefor more gravity

Multiple Choice

A person would weigh more on Jupiter than on the Earth because---

• Jupiter has less mass, and therefore less gravity

• Jupiter has more mass, and therefore less gravity.

• Jupiter has less mass, and therefore more gravity.

• Jupiter has more mass, and therefore more gravity

Multiple Choice

If Earth's mass was cut in half, what would happen to your mass?

• increase because gravitational force increases

• decrease because gravitational force decreases

• decrease because gravitational force increases

• nothing, mass is not affected by gravitational force

The Formation of Our Solar System

​The Nebular Theory Steps:

​

​The formation of our solar system began from a nebula.

1. A gravitational attraction among particles caused them to drift toward the center of the cloud.

2. ​As the cloud contracted (pulled in), it began to rotate (spin).

3. ​As more gas and dust were pulled toward the center of the cloud, it began to rotate faster and flattened into a disk.

The Formation of Our Solar System

​The Nebular Theory Steps:

​

​The formation of our solar system began from a nebula.

​

​4. The core of the cloud became so dense that nuclear fusion began-and our Sun was born!

​5. The remaining gas and dust combined together to form our planets and their moons.

​Planetesimals are the beginning stages of making a planet.

​The Solar System Today

​Our Sun –

The heart of our solar system –

is a yellow dwarf star, a hot ball of Hydrogen & Helium.

​

Its gravity holds the solar system together, keeping everything from the biggest planets to the smallest particles of debris in its orbit.

Multiple Choice

OUR solar system formed from:

• the solar meteoroids

• the solar nebula