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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?

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

Waves

Surges

Tsunamis


WHAT ARE THE SOURCES OF ENERGY ON COASTS?

Tides*

Waves*

Surges

Tsunamis


How do tides work
How do Tides Work?

363,104 km

(225,622 mi)

406,696 km

(252,622 mi)

N


How do tides work1
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




Ocean waters

on this side pulled towards line.


Ocean waters

on this side pulled towards line.




Time 0 hours
Time 0 hours

Earth’s

Rotation

N



Time 6 hrs
Time +6 hrs

N


Time 9 hrs
Time +9 hrs

N






Time 24 hrs
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








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 distance, despite large mass.

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 distance, despite large mass.

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 distance, despite large mass.

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 distance, despite large mass.

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 distance, despite large mass.

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 distance, despite large mass.

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 distance, despite large mass.

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 distance, despite large mass.

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 distance, despite large mass.

“Waxing”

Moon

“Waning”

Moon

Full

Half

New

Half

Full

SAME

OPPOSED

SAME

OPPOSED

SAME

SUN


SAME distance, despite large mass.

OPPOSED

SAME

OPPOSED

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

SAME

SUN


ENHANCE distance, despite large mass.

SAME

OPPOSED

SAME

OPPOSED

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

SAME

SUN


Weaken distance, despite large mass.

ENHANCE

SAME

OPPOSED

SAME

OPPOSED

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

SAME

SUN


ENHANCE distance, despite large mass.

Weaken

ENHANCE

SAME

OPPOSED

SAME

OPPOSED

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

SAME

SUN


Weaken distance, despite large mass.

ENHANCE

Weaken

ENHANCE

SAME

OPPOSED

SAME

OPPOSED

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

SAME

SUN


ENHANCE distance, despite large mass.

Weaken

ENHANCE

Weaken

ENHANCE

SAME

OPPOSED

SAME

OPPOSED

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

SAME

SUN


High Tide distance, despite large mass.

Level

Low Tide

Level


High tide distance, despite large mass.

Low tide


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