Tides

Question 1

High tides. Where do they form

Answer 1

When part of the pcean is directly facing the moon, the water there bulges toward the moon. At the same time, water on the opposite side of earth bulges because of the rotation of the earth and the motion of the moon around the earth

Question 2

Low tides

Answer 2

When high tides occur, water is drawb away frim the area between the high tides.

Question 3

Tide

Answer 3

A daily change in the level of ocean water

Question 4

Were on the earth. Relative to the moon. Do high tides occur

Answer 4

The part closest to the moon and on the opposite side

Question 5

How often tides occur and the difference intidal levels depends on what?

Answer 5

The position of yhe moon as it revivles around the earth

Question 6

The moons pull is the strongest on the earth where?

Answer 6

Its on the strongest in the part of the earth directly facing the moon

Question 7

What determines when the tides occur?

Answer 7

The rotation of the earth and the moons revolution around the earth

Question 8

If the earth a d moon rotated at the same speed what would happen?

Answer 8

The tides would not alternate between high and low

Question 9

What revolves slower the earth or moon?

Answer 9

The moon revolves around the earth much slower then the earth rotates

Question 10

A spot on the earth that is facibg the moon will take how long to face the moon again?

Answer 10

24 hours and 50 minutes

Question 11

The sun also affects what?

Answer 11

Tides

Question 12

Why is the suns influence on tides weaker than the moons influence?

Answer 12

Though the sun is much larger than the moon, then sun is much farther away from the earth

Question 13

The combined forces of the sub and the moon in the earth results in what?

Answer 13

In tidal ranges that vary based on the positions of all three bodies

Question 14

Tidal range

Answer 14

The difference between levels of ocean water at high tide and low tide

Question 15

Declination

Answer 15

As the moon orbits the earth, it’s angle increases and decreases relative to the equator. The tides follow the moons declination and change their angles to match

Question 16

As the angles of the sun. Moon and earth affect the tidal heights over a lunar month so do what?

Answer 16

Their distances to one another

Question 17

What is the distance that varies between the earth and the moon- since the moon follows an oval path around the earth

Answer 17

31,000 miles

Question 18

What happens once a month, when the moon is the closest to the earth (perigee)?

Answer 18

Gravitational/ inertia forces are higher than usual- producing above average tidal ranges

Question 19

Two weeks later ( after perigee ), the moon is the farthest away (apogee) what happens?

Answer 19

The lunar tide raising force is smaller producing smaller tidal ranges

Question 20

When the earth is closest to the sun ( perihelion )- occurs about Jan. 2 of each year, what happens?

Answer 20

The tidal waves get larger

Question 21

When the earth is furthest from the sun ( aphelion ), around July 2, what happens?

Answer 21

The tidal ranges get smaller

Question 22

If the earth were a perfect sphere without large continents, all areas ob the planet would experience what?

Answer 22

Two equal high and low tides every lunar day

Question 23

what do the large continents on the planet do?

Answer 23

They block the westerly passage of the tidal bulges as the earth rotates

Question 24

Most coast. With a few exceptions experience how many a tides a day?

Answer 24

2 both high and low

Question 25

A lunar day is 50 min longer than what?

Answer 25

A solar day (24 hours)

So lunar day= 1 day + 50 minutes

Question 26

How long do high tides occur apart from?

Answer 26

12 hours and 50 minutes

Takes 6 hours and 12.5 minutes for the water at shore to fron high to low. Or low to high

Question 27

The ebb current is greater at low tide. What is greater at high tide?

Answer 27

Flood current

Flood current»» Shore

Question 28

Tidal current

Answer 28

Horizontal movement of water often accompanies the rising and falling of the tide

Question 29

Flood current

Answer 29

Incoming tide along the coast and into the bays and estuaries

Question 30

Outgoing tide

Answer 30

Ebb current

Question 31

Slack tides

Answer 31

Weakest currents occuring between the flood and ebb currents

Question 32

Inertia

Answer 32

The tendancy of moving objects to continue moving in a straight line. Acts to counterbalance gravity

Question 33

Remember this‼️‼️

Answer 33

On the opposite side of the earth, inertia wins out because the moon is farther away so there is a bulgeof water on the side opposite of the moon

Question 34

Spring tides

Answer 34

Tides with the largest daily tidal range and occur during the new and full moon. Or every 14 days

These occur when the sun. Earth. And moon align

Question 35

Neap tides

Answer 35

Tides with the smallest daily tidal range and occur during the first and third quarters of the moon

^ occur when the sun. Earth. And moon form a 90 degree angle

Question 36

After a _____ _____ has been measured, the times that tides occur can be accuratly predicted

Answer 36

Tidal range

Question 37

In some coastal areas that have narrow inlets, movements of water called _____ _____ occur

Answer 37

Tidal bore

Question 38

Tidal bore

Answer 38

A body of water that rushes up through a narrow bay, estuary, or river chann l during the rise of high tide and causes a very sudden tidal rise

Question 39

Tidal bores can occur where? (4 places)

Answer 39

Areas of China. The British Isles. France. Canada

Question 40

The magnitude of the tides can be influenced by what?

Answer 40

The shape of the shoreline