the conditions of the atmosphere at a given located at short time
What is weather?
100
this causes most local weather conditions changes
What is movement of air masses?
100
low-pressure systems usually bring this
What are cloudsand unstable conditions?
100
the two most prevalent gases in our air
What are oxygen and nitrogen?
200
the three classes of rocks.
What are sedimentary,metamorphic,and igneous?
200
the charicteristic weather that prevails from season to season and year toyear
What is climate?
200
the movement of air masses is determined by two things
What are prevailing winds andupper air currents?
200
this is the general movement of highs and lows across the united states
What is from west to east?
200
as the density of air decreeses,its pressure
What is decreases?
300
most rocks show charicteristics that give clues to this
What are their formation conditions?
300
the cause of weather
What is the uneven heating of earths surface?
300
boundaries between air masses
What is fronts?
300
hazardous weather conditions [5]
What is thunderstorms,tornadoes,hurricans,ice storms,and blizzards?
300
this type of air mass is warm and humid
What is maritime tropical?
400
this model shows how types of rock or rock material maybe transformed from one type of rock to another
What is the rock cycle?
400
these form when air remains nearly stationary over a large section of earths surface and takes on the conditions of temperature and humidity from that location
What is air mass?
400
this is likely to occur at fronts
What is precipitation?
400
this is crucial for humans to be able to prepare for and respond to hazardous weather conditions
What is what is sufficient warning?
400
instruments used to measure air pressure
What are barometers?
500
this rock can float
What is pumice?
500
weather conditions at a location are determined primarily by 3 things
What are temperature,humidity,and pressure of air masses over that location?
500
these systems generally bring fair weather
What is high-pressure?
500
two was substances enter the stmosphere
What are naturally and from human activity?
500
most air pollution comes from what is burning fossil fuels