The Big Bang Theory
How long ago did the big bang happen?
13.8 billion years ago
This theory explains the origin of our solar system from a rotating cloud of gas and dust.
The nebular theory
How many stars are in the Milky Way?
Around 200-400 billion
Earth formed about this many years ago
4.5 billion years ago
How many oceans are there?
7 oceans
Who came up with this theory?
Edwin Hubble
According to the Nebular Theory, the solar system formed from this type of interstellar material.
Nebula
How many stars in our solar system?
The process where heavier elements sank to the center and lighter elements rose to the surface created these three main layers.
Core, mantle, and crust
How was the oceans water created?
Acid rain
What caused the big bang to happen?
All matter and energy were packed into an extremely dense and hot point
What force caused the nebula to collapse, starting the process of solar system formation?
Gravity
What type of galaxy is the Milky Way?
Spiral galaxy
These small, early building blocks of Earth collided and combined during its formation.
Planetesimals
Salinity
True or false: After the big bang the universe continues to increase in density and heat up.
False
As the nebula collapsed, it began to flatten into this shape
Disk
What type of planet is pluto?
Dwarf planet
Tiny dust and rock particles came together to form planetesimals through this process.
Accretion
Name all 7 oceans
North Pacific, South Pacific, North Atlantic, South Atlantic, Indian, Arctic, and Southern