Common Assessment Flashcards
(21 cards)
What are the three forms of ocean movement?
- Waves
- Tides
- Currents
Explain what happens to the temperature, density, salinity, and pressure
as you go deeper into the ocean.
a. Temperature:
b. Density:
c. Salinity:
d. Pressure:
Temperature Decreases
Density Increases
Salinity Increases
Pressure Increases
What are ocean currents?
An ocean current is a continuous, directed movement of sea water generated by wind and the
Coriolis effect
What causes surface currents?
Wind speed and duration
What causes deep ocean currents?
Changes in density and temperature
What is a wave?
Waves are created by energy passing through water
What causes waves?
Ocean waves are caused by wind moving across the surface of the
water.
Explain how wave height and wind speed are
related.
The faster and longer the wind is blowing the higher the wave will be.
What are the chemical properties of ocean
water?
Sodium Chloride ( NaCl )
What are the physical properties of ocean water?
Density, Pressure, and Temperature
Describe the salinity, temperature, and density
of ocean waters near the equator
Salinity: Less Salt
Temperature: Hot
Density: Low Density
Describe the salinity, temperature, and density
at the poles
Salinity: High Salinity
Temperature: Cold
Density: High Density
What 2 factors contribute to ocean density?
Salinity and Temperature
What are tides?
Tides are the rise and fall of the ocean water
What causes a tide?
The gravitational pull of the moon
What is a low tide?
When ocean water is at its lowest point. The moon is furthest away from the
ocean during low tide.
.What is high tide?
When the ocean is at its highest point. The moon is closer to the ocean during
high tide.
What is a neap tide?
When the sun, moon, and earth make a 90 degree angle. This is low tide
What is a spring tide?
A high tide. The sun, earth, and moon make a horizontal straight line.
Explain the role of the sun in the water cycle
The sun powers the water cycle. Without the sun there would be no water cycle
and no life on Earth.
You take your water bottle out of the fridge and sit it outside on a warm
summer day. You notice the side of your water bottle has moisture. Explain
what is happening to cause your water bottle to ‘sweat.’
The cool water from the water bottle makes the air around it cold. This causes
condensation to form on the water bottle, making it look like it is sweating (water
droplets).
