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Density
Convection
Currents in the Atmosphere
Currents in the Ocean
Misc.
100
What is the formula for finding density?
D=M/V
100
Convection is one form of _________________________.
heat transfer
100
Earth's surface absorbs _________________ from the Sun.
heat / radiant heat
100
These types of currents are formed mainly by wind and are found within the top 200-400 meters of the world's oceans.
surface currents
100
What is the amount of space an object takes up?
volume
200
What is the density of water? (Use correct label.)
1 g/mL
200
Convection happens only in _____________________.
fluids
200
When air is heated, it becomes less dense & ______________in the atmosphere.
rises
200
This famous warm water current brings milder winters to Western Europe.
The Gulf Stream
200
What is the amount of matter in an object?
mass
300
What is the density of a salt-solution sample which has a mass of 35 g and a volume of 25 mL? (Use the correct label.)
D= 1.4 g/mL
300
What is a convection cell?
the "circular" cycle (pattern) created by the rising & falling of a fluid
300
What happens to water vapor as it rises in the troposphere?
It cools & becomes more dense.
300
This famous cold water current brings cool breezes to Hawaii.
The California Current
300
What is the relationship between temperature and density?
The warmer the temperature, the less dense the material. (The colder the temperature the more dense the material.)
400
An object has a volume of 50 cc and a mass of 48 g. What is the density of this object and will it float on water? (Use proper label.)
D= 0.96 g/cc, Yes
400
What three factors set convection currents in motion?
1) differences in temperature, 2) differences in density, 3) the force of gravity
400
Where do massive amounts of heated air begin to rise? How do these air masses get their energy?
Above the tropics / tropical oceans / equator. From reradiation (some conduction)
400
These are massive spirals of water moving in the world's oceans. They rotate clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere.
gyres
400
If the gases that make up Earth's atmosphere all have different densities, why don't they layer out?
Because of circulation, convection currents are always in motion, so the gases don't layer out.
500
I have two samples of salt-water solution. Vial #1 is 45 mL and its mass is 54 g. Vial #2 is 120 mL and its mass is 132 g. Which sample has the greater density? (State both densities, with proper labels.)
Vial #1 = 1.2 g/mL, Vial #2 = 1.1 g/mL, Vial #1 has the greater density
500
Explain how convection worked in each of our experiments in class (the blue water in the bottom of the vial & the convection chamber demo).
Water: The blue water was cold/dense. As we placed it into hot water, it warmed/became less dense, & rose up into and swirled within the room temperature water. Chamber: Smoke was cooled by ice & fell into the chamber. It traveled across the bottom & was heated by the candle. Becoming less dense, it rose up (some out) & traveled along the top. Cycle repeated.
500
Explain how atmospheric convection impacts global weather. (This is a preview of Section #6.)
Convection cells in the atmosphere help redistribute water around the planet. (This affects wind, as well.)
500
This deep water current travels throughout the world's oceans and takes approximately 1000 years to complete one cycle. It's caused by differences in ocean water densities.
The Global Conveyor Belt
500
What does the term "thermohaline" mean?
thermo = related to heat, haline = related to salinity (salt levels)