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Science 2
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longitude
the earth rotates 360 degrees in 24 hours; it rotates 15 dgrees of longitude each hour
Travel eastward
time increases 1 hour each 15 degrees
Travel westward
time decreases 1 hour every 15 degrees
Standard time zones
establish by law to avoid confusion; Bondaries pass through unpopulated areas
eastern
75 degrees west
central
90 degress west
montain
105 degrees west
pacific
120 degrees west
International dateline
180 degrees middle of the pacific
pumice
floats
basah
common lava rocks
obsidian
volcanic glass
scoria
lots of holes
jen
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