Tides

Tides are…

• very big waves

• shallow areas of the sea

• rise / fall of the sea level

Tides are caused by the force of

• air resistance

• gravity

• friction

The highest tides occur when the gravitational pull on the oceans is…

• greatest

• smallest

• neither strong nor weak

The highest tides occur when there is a...

• full moon only

• new moon only

• full moon or new moon

What are spring and neap tides?

• Neap tides occur when the moon is at its first or third quarter

• Neap tides occur when the moon is at its second quarter

• Neap tides occur when the moon is at its first or second quarter

Does the Sun or the moon have greater influence on the tides on Earth?

• The Sun has the dominant effect.

• The Moon has the dominant effect.

• Mars has the dominant effect.

Why is neap tides so called?

• Neap means low

• Neap means high

• Neap means maximum

Do other planets have any effect on tides?

• No. The tidal force generated by other planets is negligible.

• Yes. The tidal force generated by other planets is not negligible.

• some times.

high tides occur approximately every 12 hours 25 minutes.

• True

• False

Tides travel as waves

• True

• False