Tides and Currents

Tides, Waves, and Currents

How do the Tides Affect the Ocean?

Vocabulary:

Tide

Tidal Range

Multiple Choice

What causes tides?

• gravity

• wind

• spring

• neap

Multiple Choice

Which body has the greater effect on Earth's tides?

• Sun
• Saturn
• Moon 
• Venus

Multiple Choice

The area covered by high tide mark and the low tide mark is called the

• Tidal zone

• Intertidal area

• Tidal range

• Optimal range of tidal movement

Multiple Choice

Differences in the moon's and sun's pull on different sides of the Earth cause _________.

• gravity
• lunar phases
• tides
• dabbing

Multiple Choice

At the same time the sea is drawn to the moon, another tidal bulge takes place on other side of Earth. True or False?

• True

• False

• Maybe

• I don't know!

Time and Tides

Vocabulary:

Tide Table

Semidiurnal Tide

Diurnal Tide

Mix Tide

Multiple Choice

If tides alternate from high to low and there are two of each type of tide a day, about how many hours will generally be between each different tide?

• 2 hours
• 6 hours
• 12 hours
• 24 hours

Multiple Choice

Tides are the cycle of rising and falling ocean water that repeats automatically every

• 24 hours
• 12.5 hours
• 25 hours
• 6.25 hours

Gravity and Tides

Vocabulary:

Tidal Bulge

Gravity

Spring Tides

Neap Tides

Perigee vs. Apogee

Perihelion vs Aphelion

Multiple Choice

What do we call tides that have a smaller range that happen when the sun and moon are at right angles to each other?

• Neap Tide
• Spring Tide
• Larger Change
• Smaller Change

Multiple Choice

What do we call a tide that has a large range?

• gravity
• wind
• spring
• neap

Multiple Choice

The diagram below shows the alignment of the sun, the moon, and Earth. In which locations are neap tides taking place?

• 1 and 2

• 1 and 3

• 2 and 4

• 3 and 4

Multiple Choice

What is a difference between spring and neap tides?

• Spring tides occur when the earth and sun are IN LINE with the new or full moon. 
• Spring tides occur when moon in 3rd or 1st quarter phases
• Spring tides are LOWER than neap tides
• Spring tides occur in Spring and neap tides can occur in any season

Multiple Choice

What type of tide would this arrangement of earth-moon-sun create?

• full moon tide

• new moon tide

• neap tide

• spring tide

Multiple Choice

The bulge of water on the side of the Earth closest to the moon produces ___________.

• high tide
• low tide
• neap tide
• spring tide

Life Cycles and Tides

Vocabulary:

Grunion run

Horsecrab spawning