Unit 3: The Dynamic Ocean

What is the lowest point of a wave called?

• crest
• trough
• breaker
• peak

At low tide there is _____.

• less beach
• more water
• higher water
• more beach

Which WOULDN'T cause a tsunami?

• earthquake

• underwater volcanic eruption

• gravity

• asteroid impact

What is the highest point of a wave called?

• the top
• peak
• crest
• trough

What is the distance from the crest of one wave to the crest of another?

• current
• peak
• wave height
• wave length

Deep ocean currents are caused by...

• density differences caused by temperature & salinity. 

• changes in wind directions.

• prevailing winds.

• gravity

The rise and fall of Earth's waters on its coastlines are called

• currents

• tides

• waves

• gravity

There are two high tides and two low tides every

• every year

• approximately every 24 minutes

• approximately every 24 hours

• approximately every 12 hours

When the moon is at full moon or new moon, what type of tide will we experience?

• rip tide
• spring tide
• neap tide
• breaker tide

TRUE or FALSE: The sun has a stronger tidal force on Earth than the moon.

• TRUE

• FALSE