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chapter one info

7th grade s.s. chapter 1 info

The seven continents North America, South America, Asia, Africa, Australia, Antartica, Europe
Distance north and south of the equator latitude
Distace east and west of the Prime Merdian longitude
Water covers up how much of the Earth surface 70%
The angle of the suns rays cause seasons
The amount of _____ on earth always stays the same water
What seasons begin the two equinoxes spring and autumn
what two gases make up 99% of earth's atmosphere nitrogen and oxygen
What is the diffrence between history and pre history pre history is before written records
What are Earth's three main layers core, mantle, and crust
how far is earth tilted on its axis 23.5 decrese
one orbit for earth every 365 and 1/4 days
sun gives off ______ and______ for life on earth light and warmth
one complete rotation on earth's axis 24 hours
inner core solid, made of iron mixed with other metals and rock
outer core liquid made of hot irons mixed with other metals and rock
mantle about 1,800 miles thick inner solid, outer can melt
magma melted rock from outer mantle
crust the thin and solid outermost layer of the Earth above the mantle only about 31 to 62 miles deep
plate tectonics a theory stating that the earth's surface is broken into plates that move by floating on top of liquid rock just below earth's surface
cracks in the Earth's crust. earth quakes can happen near these faults
The breaking down of rocks and other materials on the Earth's surface. weathering
the wearing away of soil and rock particles by waves, wind, running water, or glaciers erosion
Created by: ejmroxz