Earth's Formation

How much matter in the solar system exists in the sun?

• 1%

• 99%

• 80%

• 20%

Which type of planet formed in its location due to its ability to withstand the heat from the sun?

• Ice Giants

• Gas Giants

• Rocky/Terrestrial Planets

What caused Earth to melt during Earth's early formation?

• fusion

• radioactive decay

• heat from the sun

Answer explanation

The radioactive elements that existed in the mashed up rocks that formed the rocky planet released energy that in turn heated and melted the rocks.

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-6

True or False: Earth cooled from the inside out.

• True

• False

Answer explanation

If Earth had cooled from the inside out, we would not still have internal heat.

What caused the surface of Earth to form crust?

• Water cooled it off.

• Space cooled it off.

• It has always had crust.

Answer explanation

The space surrounding Earth when it was forming was significantly lower in temperature, causing heat transfer.

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-2

True or False: Gravity causes massive objects in space to become spheres.

• True

• False

Answer explanation

Go here for a good explanation. It is worth it to read the whole thing. https://spaceplace.nasa.gov/planets-round/en/

Why don't asteroids become spheres?

• They eventually do.

• The mass isn't big enough.

• They are rock.

• They are not made of the right material.

Answer explanation

Did you notice the asteroid in the picture has impact craters from smaller asteroids.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Does a gas giant have a solid core?

• yes

• no

Why did the gas giants form so far from the sun?

• They had to.

• It's where the gasses could collect.

• The asteroid belt kept them there.

A ____ is an icy object that orbits the sun.

• meteor

• comet

• asteroid