Ocean Tides

Tides

What Causes Tides?

• Gravitational

attraction between
the Earth, the moon,
and the sun.

•

Tidal Day

• The tidal cycle is 24 hrs and 50 min (time to complete high --> low --> high --> low)
• High and low tides shift 50 min later each day.

Multiple Choice

Tides shift by _____ minutes each day.

• 25

• 50

• 60

• 10

Multiple Choice

How long is the average tidal cycle?

• 48 hours and 30 min

• 24 hours and 50 minutes

• 12 hours and 25 minutes

• 6 hours and 15 min

Spring Tide

• During the new moon and the full moon, the

sun’s gravitational pull is in the same direction as
the moon.

• Higher high tide and lower low tides.

Neap Tides

• During the first

quarter moon and
last quarter moon
the Sun, Earth, and
Moon are at a right
angle.

• Higher low tides

and lower high
tides.

Multiple Choice

What are the two main types of ocean tides?

• Rip Tides and undertows

• Tidal waves and tsunamis

• High tides and medium tides

• Spring tide and neap tide

Multiple Choice

The Moon and Sun pull the water in the ______ direction in a Spring Tide.

• same

• different

• opposite

• alternating

Match

• Higher High Tides and Lower Low tides

• Lower high tides and higher low tides

• New moon and full moon

• Sun and moon pull in different directions

Spring tide

Neap tide

Spring tide moons

Neap tide sun and moon position

• Spring tide

• Neap tide

• Spring tide moons

• Neap tide sun and moon position

Multiple Choice

What causes the variation in tidal patterns?

• Rotation of the Earth

• Rotation of the planets

• Gravitation forces by the sun and moon

• The rotation of the Milky way

•Semidiurnal Tide: 2 high tides and 2 low

tides per day

•Diurnal Tide: 1 high tide and 1 low tide

per day

Dropdown

2 high and 2 low tides is called​

Select answer

tides. 1 high and 1 low is called​

Select answer

tides.

Tidal Range

The difference between high and low tides (in feet).

Multiple Choice

What is the tidal range?

• 8.1 m

• 9.1 m

• 1 m

• 0 m