FLS Science-7th-Ch. 14 Ocean Motions

Which of the following are produced primarily by gravity?

• waves

• currents

• gyres

• tides

Daily or twice-daily changes in local sea level due to the moon's gravity are

• spring tide

• lunar tides

• neap tide

• bulge

What usually has the greatest influence in causing tides?

• the earth's core

• the moon

• the sun

• the weather

Currents that flow parallel to the shore are called_______________ currents.

• wavelength

• wave height

• fetch

• breaker

• longshore

The Coriolis Effect affects only currents moving north or south but not those moving east or west.

• True

• False

High tides happen when a spot on Earth rotates through a tidal

• spring tide

• lunar tides

• neap tide

• bulge

Narrow, fast currents that flow offshore through gaps in offshore bars are called _______________ currents.

• wavelength

• wave height

• rip

• breaker

• longshore

The most direct method to measure sea level in a coastal harbor is by using a(n) ______________

• density guage

• tide gauage

• surface guage

• tidal bulge

What type of current is associated with a thermohaline current?

• surface current

• upwelling

• downwelling

• density current

What type of current is associated with gyre?

• surface current

• upwelling

• downwelling

• density current