What process created the plantesimals (the young version of our planets)?

Accretion of particles in the solar nebula

The planetesimals keep:

Colliding and sticking together

The Nebular Theory is:

A theory on how the solar system was formed

When the sun formed, it blew most of the gasses towards the edges of the solar system. How do we know?

the gas planets are very far from the sun

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Formation of Solar System

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Answers

1
What caused the solar nebula to contract and spin?
Nuclear Fusion
A supernova
an asteroid impact
Heating
2
What process created the plantesimals (the young version of our planets)?
Nuclear fusion
The solar wind that blew dust to the outer edge of the solar system
Gravitational pull between the sun and the planets
Accretion of particles in the solar nebula
3
Where in our solar system would you expect to find a planet that is mostly made of gas?
Very close to the sun
Very far from the sun
Outside of the sun's gravitational pull
Very close to other planets
4
The planetesimals keep:
Colliding and breaking apart
Colliding and bouncing around
Breaking down into smaller pieces
Colliding and sticking together
5
When the inner planets (and moons) were bombarded by asteroids, what did the asteroids leave behind?
mountains
calderas
craters
valleys
6
The inner core is the thickest layer of Earth?
False
True
7
The Nebular Theory is:
A theory on how the solar system was formed
A theory on how the universe was formed
A theory on how the Milky Way galaxy was formed
A theory on how the solar system will be destroyed
8
What caused the lighter elements to leave the terrestrial planets?
Heat from the Sun
Gravity from the Sun
Gravity from the Gas Giants
Nothing, the lighter elements stayed
9
The most abundant gasses in a nebula are:
Oxygen & Helium
Hydrogen & Oxygen
Hydrogen & Helium
Nitrogen & Oxygen
10
When the sun formed, it blew most of the gasses towards the edges of the solar system. How do we know?
the gas planets are very far from the sun
there is no gas at all on planets close to the sun
there is a huge nebula of gas on the edge of our solar system
the gas planets are very close to the sun
11
Intense pressure in the protosun (protostar) caused:
Nuclear Fusion to start
Helium to break down into Hydrogen
Fire in the Sun to start
Nuclear Fusion to end

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