WHAT ARE THE SOURCES OF ENERGY ON COASTS?
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WHAT ARE THE SOURCES OF ENERGY ON COASTS? Rivers deliver sediment to the oceans. How are they distributed and how can the oceans cause erosion?. WHAT ARE THE SOURCES OF ENERGY ON COASTS?. Tides. WHAT ARE THE SOURCES OF ENERGY ON COASTS?. Tides Waves.

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WHAT ARE THE SOURCES OF ENERGY ON COASTS?

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WHAT ARE THE SOURCES OF ENERGY ON COASTS?

Rivers deliver sediment to the oceans. How are they distributed and how can the oceans cause erosion?


WHAT ARE THE SOURCES OF ENERGY ON COASTS?

Tides


WHAT ARE THE SOURCES OF ENERGY ON COASTS?

Tides

Waves


WHAT ARE THE SOURCES OF ENERGY ON COASTS?

Tides

Waves

Surges


WHAT ARE THE SOURCES OF ENERGY ON COASTS?

Tides

Waves

Surges

Tsunamis


WHAT ARE THE SOURCES OF ENERGY ON COASTS?

Tides*

Waves*

Surges

Tsunamis


How do Tides Work?

363,104 km

(225,622 mi)

406,696 km

(252,622 mi)

N


How do Tides Work?

If Earth was not also revolving around the Sun , the moon would take 27.3 day complete a revolution.

Earth

363,104 km

(225,622 mi)

406,696 km

(252,622 mi)

N

Moon

As the Earth is moving it actually takes 29.5 days.


Earth

Moon

N

Sun

S

Moon


Earth covered in Oceans.


Line of maximum gravitational pull

Moon


Ocean waters

on this side pulled towards line.


Ocean waters

on this side pulled towards line.


Ocean waters “shallower” than average. Low tide.


Ocean waters “deeper” than average. High tide.


Time 0 hours

Earth’s

Rotation

N


Time +3 hrs.

N


Time +6 hrs

N


Time +9 hrs

N


Time +12 hrs.

N


Time +15 hrs.


Time +18 hrs.


Time +21 hrs.

N


Time +24 hrs.

N

High

Tide

High

Tide

High

Tide

Low

Tide

Low

Tide


Earth’s Revolution around the Sun

Approximately one month

A twelfth of a full revolution

15° of a circle

SUN


Earth’s Revolution around the Sun

Moon’s Revolution around the Earth.

Day 1

SUN


Earth’s Revolution around the Sun

Moon’s Revolution around the Earth.

Day 7

Day 1

SUN


Earth’s Revolution around the Sun

Moon’s Revolution around the Earth.

Day 15

Day 7

Day 1

SUN


Earth’s Revolution around the Sun

Day 22

Moon’s Revolution around the Earth.

Day 15

Day 7

Day 1

SUN


Earth’s Revolution around the Sun

Day 29

Day 22

Moon’s Revolution around the Earth.

Day 15

Day 7

Day 1

SUN


Moon’s gravitational pull on the Earth

SUN


Moon’s gravitational pull on the Earth

SUN


Moon’s gravitational pull on the Earth

SUN


Moon’s gravitational pull on the Earth

SUN


Moon’s gravitational pull on the Earth

SUN


Sun’s gravitational pull on the Earth. Weaker because of distance, despite large mass.

SUN


Sun’s gravitational pull on the Earth. Weaker because of distance, despite large mass.

Sun and Moon’s

gravitational pull in SAME direction.

SUN


Sun’s gravitational pull on the Earth. Weaker because of distance, despite large mass.

Sun and Moon’s

gravitational pull OPPOSED.

Sun and Moon’s

gravitational pull in SAME direction.

SUN


SAME

Sun’s gravitational pull on the Earth. Weaker because of distance, despite large mass.

Sun and Moon’s

gravitational pull OPPOSED.

Sun and Moon’s

gravitational pull in SAME direction.

SUN


OPPOSED

SAME

Sun’s gravitational pull on the Earth. Weaker because of distance, despite large mass.

Sun and Moon’s

gravitational pull OPPOSED.

Sun and Moon’s

gravitational pull in SAME direction.

SUN


SAME

OPPOSED

SAME

Sun’s gravitational pull on the Earth. Weaker because of distance, despite large mass.

Sun and Moon’s

gravitational pull OPPOSED.

Sun and Moon’s

gravitational pull in SAME direction.

SUN


Full Moon

Entire lighted portion visible from Earth

SAME

OPPOSED

SAME

Sun and Moon’s

gravitational pull OPPOSED.

Sun and Moon’s

gravitational pull in SAME direction.

SUN


Half Moon

Only half of lighted portion visible from Earth

SAME

OPPOSED

SAME

Sun and Moon’s

gravitational pull OPPOSED.

Sun and Moon’s

gravitational pull in SAME direction.

SUN


New Moon

Lighted portion invisible from Earth

SAME

OPPOSED

SAME

Sun and Moon’s

gravitational pull OPPOSED.

Sun and Moon’s

gravitational pull in SAME direction.

SUN


Half Moon

Only half of lighted portion visible from Earth

SAME

OPPOSED

SAME

Sun and Moon’s

gravitational pull OPPOSED.

Sun and Moon’s

gravitational pull in SAME direction.

SUN


Full Moon

Entire lighted portion visible from Earth

SAME

OPPOSED

SAME

Sun and Moon’s

gravitational pull OPPOSED.

Sun and Moon’s

gravitational pull in SAME direction.

SUN


What we see from Earth

“Waxing”

Moon

“Waning”

Moon

Full

Half

New

Half

Full

SAME

OPPOSED

SAME

OPPOSED

SAME

SUN


SAME

OPPOSED

SAME

OPPOSED

Impact of Sun on the strength of Moon’s tidal pull

SAME

SUN


ENHANCE

SAME

OPPOSED

SAME

OPPOSED

Impact of Sun on the strength of Moon’s tidal pull

SAME

SUN


Weaken

ENHANCE

SAME

OPPOSED

SAME

OPPOSED

Impact of Sun on the strength of Moon’s tidal pull

SAME

SUN


ENHANCE

Weaken

ENHANCE

SAME

OPPOSED

SAME

OPPOSED

Impact of Sun on the strength of Moon’s tidal pull

SAME

SUN


Weaken

ENHANCE

Weaken

ENHANCE

SAME

OPPOSED

SAME

OPPOSED

Impact of Sun on the strength of Moon’s tidal pull

SAME

SUN


ENHANCE

Weaken

ENHANCE

Weaken

ENHANCE

SAME

OPPOSED

SAME

OPPOSED

Impact of Sun on the strength of Moon’s tidal pull

SAME

SUN


High Tide

Level

Low Tide

Level


High tide

Low tide


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