Transcript Tides and Moon

MOON & TIDES
Does the moon’s height in the
sky affect how high or low the
tides are?
Hypothesis
• When the moon is higher in the sky the
tides will be more extreme.
• When the moon is higher in the sky the
tides will be less extreme.
• The moons placement in the sky will have
no effect on the tides.
Height Does Not Matter
The Moon Does Pull the Water
The Sun Helps With the Extreme
High and Low Tides
Moon’s Height In One Month
Moon
80
Degrees in Sky
70
60
50
40
30
20
10
0
400
800
1200
1600
2000
2400
2800
Time of Day
3200
3600
4000
4400
4800
Tide’s Height Over One Month
The difference in Low and High Tides
16
14
12
Feet
10
8
6
4
2
0
12th
Day of Observation
Comparison
Moon
80
60
50
40
30
20
10
0
400
800
1200
1600
2000
2400
2800
3200
Time of Day
The difference in Low and High Tides
16
14
12
10
Feet
Degrees in Sky
70
8
6
4
2
0
12th
Day of Observation
3600
4000
4400
4800
History of Tidal Prediction
The first to claim tidal
predictions in Britain was
John Wallingford around 1213.
He used the different phases of the
moon to predict the “spring” and
“neap” tides.
Sir Isaac Newton’s discovery of
gravity led to the equilibrium
theory of tides.
1873 First tide predicting
machine.
In 1928 the Germans improved
the tide prediction engine. This
stayed in widespread usage until
the 1960’s.
Southeast Alaska Natives
• The Raven brought the sun, moon and stars.
• The Tide Woman agreed to provide low
tides for food.
• They used the phases of the moon to
understand the extreme high and low tides.
THANK YOU