Show:
Air
Air Pressure & Weather
Air & Ocean Currents
Energy & States of Matter
El Nino & Weather
100
What is Density?
The amount of mass in a given volume
100
What is air pressure?
force caused by weight of air pushing on everything
100
What is the transfer of heat energy by touch called? What about through fluids of moving particles?
conduction, convection
100
This is the process from liquid to gas? what about from gas to liquid?
evaporation, condensation
100
Which path (N,S,E,W) do global winds normally go?
Normally, it is from cool east to warm west.
200
What happens to the density when air particles are heated?
They start to move faster, expanding, increasing the volume, and decreasing the density
200
What is the name of the instrument that measures air pressure? What did it have in the old days?
barometer, mercury
200
What is the circular pathway in which energy travels because of heat energy?
convection current
200
When we want to know the amount of water vapor, that is ______, but when we want to know the CAPACITY the air can hold at a temperature, that is....
humidity, relative humidity
200
What happens in El Nino?
abnormally global winds go from west to east.
300
What is going to happen to warmer air in the presence of colder air?
it is less dense, so it will float on top of the cooler air (more dense)
300
Is there greater or lower air pressure at sea level? Why?
greater pressure because it's warmer than mountains (higher in altitude) and particles are moving faster, causing more pressure
300
Which absorbs more energy, land or water? what happens as a result?
land absorbs more heat, a convection current
300
An icicle that changes to water and then evaporates. Name the states of matter in each step.
solid, liquid, gas!
300
What is a front?
a boundary that forms when 2 different air masses meet
400
Why does a hot air balloon float?
because the air outside is more dense than air inside
400
air pressure is measured in 2 different units, what are they?
milliliters and millibar
400
During the day, do we get a sea or land breeze? Why?
sea breeze because the water is cooler, so the air goes towards the warmer land
400
Why can we compare condensation to how it rains? (think about activity we did last week)
The water vapor gas particles slow down at the cool atmosphere and turn into liquid- rain
400
What is area where an air mass forms?
a source region!
500
When compared to a 9 inch WOODEN ball, a 9 inch METAL ball will have greater
DENSITY!!! ( the metal has more mass, both have same volume)
500
What is the average air pressure at sea level?
1,013 millibars!
500
Why does cool air go towards warm air?
cool air is more dense so it pushes warm air upward and it creates a cycle.
500
Why do you feel cool when you come out of a pool on a hot day?
The sun will make the water particles on your skin evaporate
500
Which instrument is used to take pictures outside of the earth and we usually see on the news?
a weather satellite