Page 702, 1. The moon rises ____ minutes later each day, this causes the tides to be ____ minutes later also each day. ▪ 50, 50 Page 702, 2. During 1 st and 3 rd quarter phases the sun and moon are at ____ ______ to each other in relation to Earth. ▪ Right angles Page 703, 3. Because the Gulf of Mexico is a smaller basin, _____ tides occur each day. ▪ 2
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Page 702, 1. The moon rises ____ minutes later each day, this causes the tides to be ____ minutes later also each day.▪ 50, 50
Page 702, 2. During 1st and 3rd quarter phases the sun and moon are at ____ ______ to each other in relation to Earth. ▪ Right angles
Page 703, 3. Because the Gulf of Mexico is a smaller basin, _____ tides occur each day.▪ 2
Warm-upNotes/discussionsVideo –tidesPlot tide graph
Tides -periodic rise and fall of the surface level
of ocean/lake waters
What causes tides? Tides are caused by the pull of gravity by
both the Moon and the SUN. Moon is more important because it is
closer.
It pulls on the land(earthquakes) and water
Also caused byrotation of Earth
Thus we have two high tides on Earth all the time.
The part of the Earth facing the moon The part of the Earth opposite the moon
There are two high tides and two low tides a day.
From high tide to high tide = 12 hours From high to low tide = 6 hours
Special Tides During New & Full Moons
Spring tides – very high tides that happen twice a month when sun, Earth, &moon are in line.
During Quarter phases Neap tides – moderate tides in which
the water level changes very little.
Sun & moon are at right angles to each other and cancel each gravitational pull.
Highest & lowest tides on Earth occur in Canada’s Bay of Fundy (50 feet)
Idea in future is to make electrical power by using the flow of tidal water. (clean power).
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