Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
What are the two main gases that make up earth's atmosphere?
|
Nitrogen - 80% and oxygen - 20%. Combined they make up roughly 97% of the atmosphere. T
|
|
|
What are the layers of the atmosphere in order?
|
Troposphere
Stratosphere Mesosphere Thermosphere Exosphere |
|
|
Where does most of the weather occur?
|
Troposphere
|
|
|
How is the troposphere warmed?
|
The sun
|
|
|
What is an isobar?
|
A line on a map connecting points having the same atmospheric pressure at a given time or on average over a given period.
|
|
|
What is an isotherm?
|
A line on a map connecting points having the same temperature at a given time or on average over a given period.
|
|
|
Why are high-pressure regions usually associated with dry weather?
|
High pressure is an area of descending air. As the air descends it compresses and heat thus lowering the relative humidity
|
|
|
Why do low-pressure regions usually bring precipitation?
|
Low pressure is the opposite. It is an area of ascending air and as it ascends it expands and cools this rises the humidity. Thus why there is rain
|
|
|
What is the difference between an air mass and a front?
|
An air mass is a body of air. It has similar characteristics to the land on top of which it forms. If there is a low pressure, there is most likely to be a storm.
Fronts are the boundaries in between two different, or same air masses. (e.g: a cold front is when a cold air mass hits a warm air mass and quickly pushes the warm air mass upward.) |
|
|
What are air mass?
|
An air mass is a body of air. It has similar characteristics to the land on top of which it forms. If there is a low pressure, there is most likely to be a storm.
|
