Totally Nebular
This is the most abundant element in the solar system
What is Hydrogen
This is where 90% the material in the collapsing nebular cloud goes.
What is the center
When planet Earth first formed, it was in this state.
What is molten and hot
This important gas was missing during the earliest years of the Earth's atmosphere.
What is Oxygen?
What is spinning on our axis and orbiting the sun?
This is the violent death of a star
What is a supernova?
As the nebular cloud collapses, these changes happen to its shape and its motion.
What is flatten into a disc and begin rotating
As the planet cooled, what formed on its surface?
What is a crust of solid rock
When fusion begins in a new star, it starts emitting this-and all of the light debris in the solar system gets blown away.
What is the solar wind?
The main reason we have seasons.
What is the 23.5 degree tilt of our axis?
Nebular clouds are huge! This is the size of a nebula
What is 25 Light Years across
Gas and dust in the nebular cloud start clumping together due to this force
What is gravity
These were the main gases in Earth's early atmosphere.
What is CO2, Methane, Water vapor, Ammonia and Nitrogen
These are the elements that are involved in nuclear fusion
What is Hydrogen and Helium
This is the Earth/Sun relationship during the winter solstice in the northern hemisphere.
What is the north pole is pointing away from the sun?
Supernova create almost all of these
What are the heavy elements on the periodic table
What is a protostar
This happened to the water vapor in the air as the young planet continued to cool.
What is it condensed and fell as rain for thousands of years
This rocky region exists between Mars and Jupiter and where most of our "shooting stars" come from
What is the asteroid belt.
This is why we call two days a year "equinoxes".
What is the day and night are 12 hours all over the world?
We think this is what causes the nebular cloud to collapse
What is a shock wave from another nearby supernova.
When the proto star reaches 10,000,000 degrees Celsius, this happens and a star is born!
What is nuclear fusion
These traveling objects brought millions of tons of water to Earth during the late heavy bombardment
What are comets?
This planet protects us from being hit by lots of debris from outer space with its massive gravity
What is Jupiter
The name of the day in the northern hemisphere when the south pole is in 24 hrs of darkness
What is the Summer Solstice?