Unit-3 Coasts

Why does the water move all the time?

• tides

• storm

• waves

• air

• currents

How often does the level of the ocean rise?

• once each day

• twice each day

• three times each day

• twice each month

When the tide is in, it is called _________.

• high tide

• low tide

• spring tide

• ordinary tide

When the tide has gone out, it is called __________.

• high tide

• low tide

• spring tide

• ordinary tide

___________ occur twice each month when the Sun and the Moon are both on the same side of the Earth.

• high tides

• low tides

• spring tides

• ordinary tides

High tide brings deep water to __________ and ports so that large ships can sail in and out.

Tides are caused mainly by the pull of the ______.

• The sun's gravity

• The earth's gravity

• The moon's gravity

_______ are big ripples of water caused by the wind.

• Hurricanes

• Tsunami

• Waves

• Currents

The highest part of a wave is known as ______.

    

• crest

• trough

• wave

• estuary

The lowest part of a wave is known as ______.

    

• crest

• trough

• mouth

• estuary