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chapter one info
7th grade s.s. chapter 1 info
Question | Answer |
---|---|
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 |