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Unit 4: Weather and Climate
1) What is the difference between weather
and climate?
• Weather refers to the atmospheric
conditions (temperature, precipitation,
wind…) in a specific place and in a
specific moment.
• While climate refers to the atmospheric
conditions in a region for a long period
of time (20 – 30 years).
2) Explain the greenhouse effect(efecto
invernadero).
• The greenhouse effect is caused by the emission of
certain gases from industry, cars and aerosols
(carbon dioxide).
• Due to this emissions the layer of gases that
surround the Earth is becoming thicker.
• This causes that the sunrays that reach the Earth
are trapped and cannot escape increasing the
temperatures of the Earth.
3) What are the elements of the climate?
The elements or components of the climate are:
• Temperatures
• Precipitation
• Wind
• Atmospheric Pressure
4) What are the factors of the Climate?
The factors of the climate can modify a climate and
they are:
• Latitude
• Altitude
• Distance from the sea
• Ocean currents
5) What is atmospheric pressure and what
two types do we have?
Pascal, 1647
5) What is atmospheric pressure and what two
types do we have?
• Atmospheric pressure is the weight that the
atmosphere exerts over us.
• We have two types high pressure and low pressure.
6) Explain what is High Pressure, how it is
represented and how is the weather
caused by it.
• High Pressure or Anticyclone (Alta presión o Anticiclón)
is when the air exerts a high pressure (the air is heavy).
• It is represented with an H (with an A in Spanish).
• It causes stable weather (sunny and dry).
• > 1013: H
• < 1013: L
7) Explain what is Low Pressure, how it is
represented and how is the weather
caused by it.
• Low Pressure or Depression (Baja presión o Borrasca) is
when the air exerts a low pressure (the air is light).
• It is represented with a L (with a B in Spanish).
• It causes unstable weather (cloudy and wet, it may
cause rain).
8) How is the atmospheric pressure
measured?
•It is measured with a
barometer and the unit
is the milibars or
hectopascals (mb or
hPa).
9) What is an Isobar?
• An isobar is a line that joins points with the same
atmospheric pressure.
10) What is wind?
• Wind is the movement of masses of air from the high
pressure areas to the low pressure areas.
Extra information:
• It usually carries with it the characteristics of the
region of origin (cold or hot temperatures, humidity
or dryness, sand...)
 High pressure areas move clockwise
 Low pressure areas move counter clockwise
 You can see it in this web: www.ventusky.com
Factors
Latitude
Altitude
Distance from the
sea
Elements
Temperatures
Precipitation
11) How do Latitude, Altitude and Distance from the Sea
affect temperature?
• Latitude: temperatures are higher in the equator than in
the poles.
• Altitude: Temperatures decrease with altitude. (0,6º C
per 100 m)
11) How do (…) affect temperatures? (Continued)
• Distance from the sea:
 Near the coast temperatures are milder or softer
(not so cold in winter and not so hot in summer).
 Far from the coast (in the inland) temperatures are
more extreme. (Winters are colder and summers
are hotter).
12) How do Latitude, Altitude and Distance from the Sea
affect Precipitation?
• Latitude: depending on the latitude precipitation vary.
• In the equator it rains a lot. (Equatorial climate)
• In the tropics it doesn’t rain much. (Desert climate)
• Altitude: it rains more in the mountains.
• Distance from the sea: it rains more near the coast
because there is more humidity.
Latitude
Altitude
Distance from the sea
13) What three type of precipitations do we have?
The three types of precipitation are:
• Convectional rainfall
• Relief rainfall
• Frontal rainfall
14) Explain convectional rainfall
In the convectional rainfall the ground is being heated by
the sun; the hot air is lighter, it rises up, it gets cooler, it
condenses and it rains.
15) Explain Relief rainfall
In the relief rainfall the masses of air are forced up to rise by
a mountain. The air rises up, it gets cooler, it condenses and
it rains.
16) Frontal rainfall. What is a front?
A front is when two masses of air of different characteristics
(one warm, one cold) meet. The boundary between these
two masses of air is called front.
17) How frontal rainfall works?
The cold mass of air pushes the warm mass of air up. When
the warm mass of air rises up it gets cooler, it condenses
and it rains.
18) What two types of fronts do we have?
There are two types of fronts cold front and warm front.
• Cold front is when the mass of air that is pushing is
cold.
• Warm front is when the mass of air that is pushing is
warm.
Cold Front Warm Front
Earth Global
Circulation
System

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Unit 4: Weather and Climate

  • 1. Unit 4: Weather and Climate
  • 2. 1) What is the difference between weather and climate? • Weather refers to the atmospheric conditions (temperature, precipitation, wind…) in a specific place and in a specific moment. • While climate refers to the atmospheric conditions in a region for a long period of time (20 – 30 years).
  • 3.
  • 4. 2) Explain the greenhouse effect(efecto invernadero). • The greenhouse effect is caused by the emission of certain gases from industry, cars and aerosols (carbon dioxide). • Due to this emissions the layer of gases that surround the Earth is becoming thicker. • This causes that the sunrays that reach the Earth are trapped and cannot escape increasing the temperatures of the Earth.
  • 5.
  • 6. 3) What are the elements of the climate? The elements or components of the climate are: • Temperatures • Precipitation • Wind • Atmospheric Pressure
  • 7. 4) What are the factors of the Climate? The factors of the climate can modify a climate and they are: • Latitude • Altitude • Distance from the sea • Ocean currents
  • 8.
  • 9.
  • 10. 5) What is atmospheric pressure and what two types do we have? Pascal, 1647
  • 11. 5) What is atmospheric pressure and what two types do we have? • Atmospheric pressure is the weight that the atmosphere exerts over us. • We have two types high pressure and low pressure.
  • 12. 6) Explain what is High Pressure, how it is represented and how is the weather caused by it. • High Pressure or Anticyclone (Alta presión o Anticiclón) is when the air exerts a high pressure (the air is heavy). • It is represented with an H (with an A in Spanish). • It causes stable weather (sunny and dry).
  • 13. • > 1013: H • < 1013: L
  • 14.
  • 15.
  • 16. 7) Explain what is Low Pressure, how it is represented and how is the weather caused by it. • Low Pressure or Depression (Baja presión o Borrasca) is when the air exerts a low pressure (the air is light). • It is represented with a L (with a B in Spanish). • It causes unstable weather (cloudy and wet, it may cause rain).
  • 17. 8) How is the atmospheric pressure measured? •It is measured with a barometer and the unit is the milibars or hectopascals (mb or hPa).
  • 18. 9) What is an Isobar? • An isobar is a line that joins points with the same atmospheric pressure.
  • 19. 10) What is wind? • Wind is the movement of masses of air from the high pressure areas to the low pressure areas. Extra information: • It usually carries with it the characteristics of the region of origin (cold or hot temperatures, humidity or dryness, sand...)  High pressure areas move clockwise  Low pressure areas move counter clockwise  You can see it in this web: www.ventusky.com
  • 21. 11) How do Latitude, Altitude and Distance from the Sea affect temperature? • Latitude: temperatures are higher in the equator than in the poles. • Altitude: Temperatures decrease with altitude. (0,6º C per 100 m)
  • 22. 11) How do (…) affect temperatures? (Continued) • Distance from the sea:  Near the coast temperatures are milder or softer (not so cold in winter and not so hot in summer).  Far from the coast (in the inland) temperatures are more extreme. (Winters are colder and summers are hotter).
  • 23. 12) How do Latitude, Altitude and Distance from the Sea affect Precipitation? • Latitude: depending on the latitude precipitation vary. • In the equator it rains a lot. (Equatorial climate) • In the tropics it doesn’t rain much. (Desert climate) • Altitude: it rains more in the mountains. • Distance from the sea: it rains more near the coast because there is more humidity.
  • 27. 13) What three type of precipitations do we have? The three types of precipitation are: • Convectional rainfall • Relief rainfall • Frontal rainfall
  • 28. 14) Explain convectional rainfall In the convectional rainfall the ground is being heated by the sun; the hot air is lighter, it rises up, it gets cooler, it condenses and it rains.
  • 29.
  • 30. 15) Explain Relief rainfall In the relief rainfall the masses of air are forced up to rise by a mountain. The air rises up, it gets cooler, it condenses and it rains.
  • 31.
  • 32. 16) Frontal rainfall. What is a front? A front is when two masses of air of different characteristics (one warm, one cold) meet. The boundary between these two masses of air is called front. 17) How frontal rainfall works? The cold mass of air pushes the warm mass of air up. When the warm mass of air rises up it gets cooler, it condenses and it rains.
  • 33. 18) What two types of fronts do we have? There are two types of fronts cold front and warm front. • Cold front is when the mass of air that is pushing is cold. • Warm front is when the mass of air that is pushing is warm.