Density currents are caused by (choose all the correct answers)
differences in temperature
differences in salinity
the moon’s gravity
The highest point of a wave is:
crest
trough
wavelength
frequency
The sun’s rays are strongest at the ________ and weakest at the __________.
equator, poles
poles, equator
ocean floor, ocean surface
midocean ridge, continental shelf
The lowest point of a wave is the
trough
crest
wavelength
frequency
Surface currents are caused by
wind that blows in regular directions
wind that blows every now and then
the moon’s gravitational
differences in salinity and temperature
This occurs when circulation in the ocean brings deep, cold water to the ocean surface
upwelling
Coriolis effect
rotation of the earth
density
The wind blows on the water, passing it’s energy to the water. As this energy passes through the water, in what way do the water molecules move?
in a small vertical circle
in waves towards the shore
in the direction of the waves
against the currents
When the sun, moon, and earth are all aligned (in a straight line), you have a
spring tide
neap tide
density current
surface current
What causes the currents to curve instead of moving in straight lines?
Coriolis effect
the moon’s gravity
wave height
density currents
What is the main cause of the gulf stream?
Winds that blow in regular directions all the time
storms
winds that blow now and then
the moon’s gravity
The size of a wave is NOT affected by the
salinity of the water
length and time the wind blows across the water
strength of the wind (how hard the wind is blowing)
distance the wind blows across the water
The amount of salt in a given amount of water is
salinity
surface current
Coriolis effect
density current
What type of ocean motion is influenced by the moon and the sun?
tides
surface currents
waves
density currents
When the wind blows across a body of water (like the ocean), ______ between the water and air causes the water to move.
friction
ions
gravity
density
_________ water rises and ________ water sinks.
warm, cold
cold, warm
none of these