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What is sea floor spreading and what is the evidence?
Older rock moving away from mid ocean ridge as younger rock forms.
What is the evidence for the magnetic poles of the earth switching?
polarity of rocks
List the 5 types of plate boundaires.
diverging, converging (c-c, c-o, o-o), transforming
What is made at transform boundaries? What is a famous example?
faults, san andreas
Which plate (oceanic or continental) subducts when they hit and why?
oceanic because it is more dense
Where is a famous place for continental-continental convergent plate boundaries?
himalayas
Where are island arches and trenches made?
converging - oo - subduction
Where are volcanoes made?
converging - co
Where are rift valleys and mid-ocean ridges made?
diverging
Where are mountains made?
Density is...
mass/volume
Why is Earth's inner core solid if it's extremely hot?
pressure from upper layers
What causes a hot spot like the one in Hawaii?
magma moving under the plates
What are the properties of the asthenosphere?
solid rock that flows
What are the properties of the lithosphere?
solid, broken into plates
Convection currents in the mantle help pull plates toward each other where they...
sink
Convection currents in the mantle help push plates away where they...
rise
What are the 2 types of converging boundaries?
collision and subduction
Plates move apart at...
diverging boundaries
Plates move toward each other at...
converging boundaries
Which two factors effect gravitational force?
mass and distance
What factor determines the path of a star on its life cycle?
mass
group of planets orbiting a star
Sound waves get compressed causing a higher pitch as they move away or get closer?
get closer
When do you use the scientific method?
when you have a question