Electricity
___ is a difference in electric potential energy between two positions
voltage
Alfred wegener
What gas makes up 78% of our atmosphere
Nitrogen
Our solar system is ____ in shape
Elliptical
What type of fusion reaction takes place in most stars?
Hydrogen Fusion
Two negatively charged partices always __ each other
Repel
Who came up with the hypothesis of seafloor spreading
Harold Hess
What is the lowest layer of the atmoshphere
Trophosphere
The solar system is our _____ and everything that travels around it
Sun
What are stars made up of at the beginning
The transfer of electrons that occurs when one object rubs on another is called
static electricity
Land that was believed to exist millions of years ago
Pangea
The most inner part of the Earth
the 4 planets closest to the sun
Inner planets
What occurs when the star runs out of hydrogen
Its core collapses and gets super hot, which then turns into a red giant.
Both lightning bolts and electric current occur becausue of
moving electric charges
Locations where tectonic plates move towards each other and collide
Convergent boundary
What part of Earth do we live on
Crust
the 4 farthest planets from our sun
Outer Planets
When does a star die
When it runs out of nuclear fuel
The source of voltage in home electric circuits is a(n)
Power plant
Tectonic plates move apart, creating new crust as magma rises from the mantle to fill the gap
Why do the temperatures in the thermosphere get warmer with increasing altitude
fewer molecules to absorb heat
All planets ___ the sun
Orbit
What does a supernova create
Neutron stars and Black holes