Unit 2 FINAL Flashcards
What is a Boundary?
When two air masses collide
What is an example of a Low pressure system?
Boundary
Explain a Low Pressure system:
When air is being lifted, movement of a cold front through a warm front, low Pressure Systems often cause severe rainfall/thunderstorms
Explain a High Pressure System:
It pushes air away, air descends, associated with drier weather conditions and clear skies
What is cold front?
The leading edge of a cooler mass of air at ground level replaces a warmer mass of air
What is a warm front?
a relatively warm, moist air mass slides up and over a cold air mass
What is weather?
The state of the atmosphere at a particular point in time
What is a stationary front?
When a cold front or warm front stops moving
What is an occluded front?
When a cold front catches up and over-takes a warm front
What kind of front produces gentle rain fall?
Warm front
What kind of front involves three different air masses and what are they?
Occluded front
Made up from two cold fronts and a warm front
Which one is most likely to produce violent thunderstorms?
Cold front
Which front is most likely to last for days?
Stationary front
Which front is likely to be followed by warm temperatures and higher humidity?
Warm fronts
Why would two air masses stay separate from one another?
Because their density is different (one is heavier than the other)
Along the front which air is forced upward?
Warm front, less dense air
Which kind of front is best for farmers, why?
Warm front is better for farmers because it brings sunshine and light storms, perfect for crops and farming
What are the causes of different water current?
Primary forces like solar heat wind gravity and secondary forces
How does water density affect to set up currents from poles to the equator and vice versa?
By cold water moving down in warm water, moving up. The warm water moves towards the poles, and the cold water moves towards the equator.
How is the movement of currents influence by prevailing winds? Give some examples:
By winds, pulling surface water with them, creating currents. For example, gravity, wind, and coriolis force
How do currents affect the temperature?
By bringing warm currents to flow parallel to the east coast of the warm continents in tropical and subtropical latitudes. In result, warm and rainy climates.
Where are cold and warm currents found?
Cold currents are found near the equator and warm currents are found in the poles (this is too, even though the temperatures through the planet)
Describe the relationship between atmospheric pressure and weather:
When the weather is warm, the pressure starts to go up. When the weather gets cold, the pressure goes down.
Explain possible causes for stormy weather:
Possible causes a stormy weather is when the pressure is around 1010 or below
What is latitude?
The distance north and south of the equator
What does weather include? (Hint: 5 examples)
heat, dryness, wind, rain, and sunshine
