OTS 6th grade WEATHER test
what are the 4 parts of the water cycle?
precipatation, condensation, evaporation, transpiration
what is humidity?
the amount of water vapor or moisture in the air
what causes "bad hair days"?
amount of humidity in the air
humidity____________ as water evaporates
what is relative humidity?
the amount of moisture that the air contains compared with the maximum amount it can hold at a particular temperature
what is saturated?
all the water that air can hold at a given temperature
what is dew point?
the temperature to which air must be cool to be completely saturated
how are dew point and condensation relaated?
condensation happens when the dew point is reached
what is a cloud?
a collection of millions of tiny water droplets or ice crystals
what are the different types of clouds?
cumulus, stratus, cirrus
what does CIRRO- mean?
what does ALTO- mean?
what does STRATO- mean?
what are some characteristics of cumulus clouds?
puffy, white, flat bottoms, mean fair weather
what are some characteristics of stratus clouds?
form in layers,blocks out the sun, covers large areas of sky
what are some characteristics of cirrus clouds?
feathery, thin, found in high altitudes
what does NIMBO- mean?
precipatation might fall
what type of cloud is fog?
what is an air mass?
a large body of air that has smilar temperature and moisture throughout
what is a source region?
an air mass that gets its moisture and temperature characteristics from the area over which it forms
how are air masses characterized?
by moisture and temperature
what does m, c, P, T, stand for on an air mass map?
c=continental T= tropical
what type of air mass influences NJ?
maritime tropical and maritime polar
what are the different types of air masses that influence weather in north america?
continental polar and maritime polar
what is a front?
when two different air masses meet, a boundary is formed between them
what type of weather is found around a front?
cloudy and stormy weather
what are the 4 types of fronts?
cold front, warm front, stationary front, and occluded front
why arent there fronts in the tropics?
because only warm air masses exist there and fronts need cold and warm air
what is a thunderstorm?
small intense weather system producing strong winds, heavy rain, lightning, and thunder
how are thunderstorms created?
what is thunder?
sound that results from the rapid expansion of air along the lightning strike
what is lightning and how is it created?
lightning is a large electrical charge that occurs between 2 oppositley charged surfaces
how are tornadoes produced?
small rotating columns of air that causes high winds speeds and low pressure
where do tornadoes mainly happen?
tornado alley in the midwest of usa
interesting info about tornadoes
75% of all tornadoes in the world happen in the USA
how are hurricanes produced?
group of thunderstorms with winds moving in 2 different directions
where are hurricanes usually found?
5°-20° north and south latitude over warm tropical oceans
what are some other names for hurricanes?
typhoons or cyclone
how do hurricanes stop?
they move to cold water
intersting info about hurricanes
most powerful storms on earth
how did El Nino get its name?
it occurs around christmas time
how are the sun and weather related?
sun fuels weather
what is a monsoon?
storm that has lots of rain and strong winds
what is a tropical storm?
a group of thunderstorms that is not powerful enough to be a hurricane
how big was the biggest piece of hail?
about 18 inches
what is a hailstone?
a piece of hail that has a different shape and size
where is hail alley?
stretches from southeast texas to canada
why would people forecast the weather?
what are the various instruments scientists use to measure the aspects of weather?
what do each of these instruments measure?
what are 2 organizations in charge of the overall weather?
what is an isobar?
what are various symbols found on a weather map and what do they mean?