Tides - Notes
Tides
The daily _______ and ______ of Earth’s water on its coastlines is called a tide.
Caused by the interaction of _________, the _________ and the ________.
Tidal range is the difference in ocean level between _______-tide and ________-tide.
Gravitational Effect of
the Moon
Two big bulges (Tidal) of water form on the Earth:
– one directly under the moon (due to gravity)
– another on the exact opposite side (due to inertia)
As the Earth spins, the bulges follow the moon.
The Daily Tide Cycle
One low-tide and high-tide cycle takes about _______ hours and _______ minutes.
Gravity and Tides
The Monthly Tide Cycle
Spring Tides
Neap Tides
The changes in the ___________ of ________, the _________, and the _______ affect the
heights of the tides during a month.
Twice a _______, at the ______ moon and the ________ moon, the earth, the sun and the moon
lined up.
High Tides are ________ and Low Tides are ________ than normal.
Tidal range is _____________.
At the _______ and _______ quarters the ________, the _______ and the ______ pull at right
angles to each other.
High Tides are _________ and Low Tides are _________ than normal.
Tidal range is _________.
Tides - Notes
During _______ and
_______ moon phases
the _______, the ______,
and ______ are in a
_________ _________
causing a greater
gravitational _______
on the Earth.
_______________ Tides
This results in higher
_______ tides and lower
______tides.
At the ______ and
______quarters the
_______, the _____ and
the _____ pull
at_______ angles to
each other.
_______________ Tides
High Tides are
________ and Low
Tides are _________
than normal.
Tidal Energy – The
Energy from Tides
Clean, renewable _________ of energy.
Harnessing tidal energy only possible when tidal range is at least ____ or _____ meters.
Very _______ locations are suitable for tidal power plants.