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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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Presentation Transcript
slide1

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?

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.

slide9

Earth

Moon

N

Sun

S

Moon

slide12

Ocean waters

on this side pulled towards line.

slide13

Ocean waters

on this side pulled towards line.

time 0 hours
Time 0 hours

Earth’s

Rotation

N

time 24 hrs
Time +24 hrs.

N

High

Tide

High

Tide

High

Tide

Low

Tide

Low

Tide

slide25

Earth’s Revolution around the Sun

Approximately one month

A twelfth of a full revolution

15° of a circle

SUN

slide26

Earth’s Revolution around the Sun

Moon’s Revolution around the Earth.

Day 1

SUN

slide27

Earth’s Revolution around the Sun

Moon’s Revolution around the Earth.

Day 7

Day 1

SUN

slide28

Earth’s Revolution around the Sun

Moon’s Revolution around the Earth.

Day 15

Day 7

Day 1

SUN

slide29

Earth’s Revolution around the Sun

Day 22

Moon’s Revolution around the Earth.

Day 15

Day 7

Day 1

SUN

slide30

Earth’s Revolution around the Sun

Day 29

Day 22

Moon’s Revolution around the Earth.

Day 15

Day 7

Day 1

SUN

slide37

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

Sun and Moon’s

gravitational pull in SAME direction.

SUN

slide38

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

slide39

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

slide40

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

slide41

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

slide42

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

slide43

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

slide44

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

slide45

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

slide46

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

slide47

What we see from Earth

“Waxing”

Moon

“Waning”

Moon

Full

Half

New

Half

Full

SAME

OPPOSED

SAME

OPPOSED

SAME

SUN

slide48

SAME

OPPOSED

SAME

OPPOSED

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

SAME

SUN

slide49

ENHANCE

SAME

OPPOSED

SAME

OPPOSED

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

SAME

SUN

slide50

Weaken

ENHANCE

SAME

OPPOSED

SAME

OPPOSED

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

SAME

SUN

slide51

ENHANCE

Weaken

ENHANCE

SAME

OPPOSED

SAME

OPPOSED

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

SAME

SUN

slide52

Weaken

ENHANCE

Weaken

ENHANCE

SAME

OPPOSED

SAME

OPPOSED

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

SAME

SUN

slide53

ENHANCE

Weaken

ENHANCE

Weaken

ENHANCE

SAME

OPPOSED

SAME

OPPOSED

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

SAME

SUN

slide54

High Tide

Level

Low Tide

Level

slide55

High tide

Low tide

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