Unit 3. climate and living beings.ppt

A
UNIT 3 CLIMATE AND LIVING BEINGS
THE ATMOSPHERE The Earth's atmosphere is a thin layer of gases that surrounds the Earth. It is composed of  99% nitrogen and oxygen, and 1%  of other gases. It is divided into layers as you can see in the picture. layer=capa surrounds=rodea
1. Troposphere .(0-10 km).  The troposphere is the lowest region in the Earth's atmosphere. The weather and clouds occur in the troposphere. The temperature decreases as altitude increases.  2. Stratosphere. (10-50km) The earth's ozone layer is located in the stratosphere. This layer absorbs a lot of ultraviolet rays which are dangerous for human beings. Because of that temperature increases at this layer THE LAYERS OF THE ATMOSPHERE located=situado / absorb=absorber / ray=rayo / increase=aumentar / decrease=disminuir / layer=capa
3. Mesosphere . (50-80 km). Temperatures quickly decrease as height increases (about –90ºC).  4. Thermosphere : (80-500km). Temperatures rise again  and it can exceed 1,000ºC 5. Exosphere.  (500-1,280km). It is the last layer of the Earth's atmosphere. It separates the Earth from the outer space THE LAYERS OF THE ATMOSPHERE II outer space=espacio exterior include=incluir / rise (increase)=subir exceed=exceder / height=altura
WEATHER AND CLIMATE day to day= día a día rainfall=precipitación / average=media / measured=medida / over= aproximadamente en ,[object Object],[object Object],[object Object]
WHAT FACTORS AFFECT CLIMATE? There are 4 factors which affect  temperature . These are summarised below:   1. Latitude   Temperatures decrease as you move away from the equator. This is because the Sun’s rays are dispersed over a larger area of land than in the equator. In addition, polar regions are colder because the Sun’s rays have further to travel than on the equator.   Sun rays go directly over the Equator areas, temperatures are higher there. move away=alejarse de / dispersed=extendidos / in addition=además / have further to travel=tienen que viajar más angle=ángulo /incoming=entrante / overhead=de pleno
3. Altitude   Temperatures decrease with height. The air is less dense and cannot hold heat as easily.  Temperatures rise 6ºC every 1,000 m high. 2. Water Currents Another important factor is the circulation of water and air. Warm air and water are transported up towards the poles, while cool air and water are transported down towards the equator.   up/down towards=hacia arriba / abajo / cool=frío / while=mientras height=altura dense=denso hold=mantener heat=calor rise=subir
4. Distance from the sea  Land heats and cools faster than the sea. Coastal areas have a lower temperature  than inland areas. On the coast winters are mild and summers are cool. In inland areas temperatures are high in the summer and cold in the winter.  What is the Greenhouse Effect? The greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere like water vapor, carbon dioxide, nitrous oxide, and methane trap energy from the sun. heat=calentarse / cool=enfriarse / inland=de interior / mild=suaves / cool=frescos / rise=subida experience=experimentar / trap=capturar
WORLD CLIMATE ZONES According to latitude, the temperature of the air changes and we have different climate zones on earth:  polar ,  temperate  and  tropical . POLAR. Average temperature 0º C all year. Lat (60º-90º N or S)  TEMPERATE. Cold winters and mild summers (0º-20º C) Lat (30º-60º N or S) TROPICAL.Hot:dry or wet all year (on average over 20ºC) Lat (0º-30º N or S) Polar - very cold and dry all year Temperate - cold winters and mmild summers Arid - dry, hot all year Tropical  - hot and wet all year Mediterranean - mild winters, dry hot summers Polar - very cold and dry all year Temperate - cold winters and mmild summers Arid - dry, hot all year Tropical  - hot and wet all year
PRECIPITATION . It is the water which falls to the earth in different forms: rain, snow, sleet or hail Precipitation occurs when water vapour cools. When the air reaches  condensation point : the water vapour condenses and forms tiny droplets of water. These tiny droplets of water form clouds. Complex forces make the water droplets fall as rainfall.   fall=caer / water vapour=vapor de agua / cool=enfriarse / reach=alcanzar / condense=condensarse / tiny droplets=gotitas / forces=fuerzas
The following examples show three different ways air is cooled causing rainfall   Warm wet air is forced to rise over high land.   As the air rises it cools and condenses. Clouds form and precipitation occurs   The sun heats the ground and warm air rises.   As the air rises it cools and water vapour condenses to form clouds An area of warm air meets an area of cold air. The warm air is forced over the cold air .  The warm air is cooled and water vapour condenses. Clouds form and precipitation occurs. Convectional Rainfall   Warm wet air is forced to rise over high land.
Rise=subir / over=sobre / cooler=más fresco / moist=húmedo / forced=forzado /  high ground=tierra alta / shadow=sombra / expand= expandirse / cool=enfriarse TYPES OF RAINFALL
ATMOSPHERIC PRESSURE Atmospheric pressure is the weight of air on the earth's surface. You can see pressure on a weather map with lines called  isobars . Low pressure  occurs when air becomes warmer. The air becomes lighter and it rises forming clouds and rain. Areas of low pressure are called  depressions High pressure  occurs when air becomes colder .  The air becomes heavier and it sinks. Areas of high pressures are called  anticyclones ,  as a result, we have cold clear days in winter and hot and sunny days in summer weight=peso / become=hacerse/ rise=ascender, subir depression=borrasca / sink=hundirse / measure=medir A  barometer  measures air pressure
Wind is the movement of  air masses  from high pressure areas (highs) to low pressure areas (lows).  A  weather vane  indicates the wind direction and an  anemometer  measures its speed in km/h. weather vane anemometer Anticyclones   send out winds and they are attracted by  depressions masses=masas / speed=velocidad / send out=enviar / attracted by=atraídos por                                                                           
ATMOSPHERIC PHENOMENA ,[object Object],[object Object],[object Object],[object Object],[object Object],Moisture=vapor de agua / bring=traer / thunder=trueno / lightning=rayo / breeze=brisa / rainbow=arcoiris / dust=polvo / haze=calima / mist=bruma
WEATHER HAZARDS AND CATASTROPHIES Caused by heavy winds: tornado hurricane Caused by heavy rains or by the absence of rain floods drought Caused by high temperatures Forest fire hazard=peligro
WORLD CLIMATES wet=húmedo / dry=seco / cool=fresco / highlands=alta montaña below.
There are 3 main areas of climate, and 11 areas within the three regions. The three main climates areas are  tropical, temperate  and  polar . TROPICAL OR WARM CLIMATES ,[object Object],[object Object],[object Object]
[object Object],Tropical areas world map Arid and semiarid areas world map rainforest desert
[object Object],[object Object],TEMPERATE CLIMATES
TEMPERATE CLIMATES ,[object Object],[object Object],Oceanic climate world map
POLAR CLIMATES ,[object Object],[object Object]
NATURAL ENVIRONMENT: PHYSICAL FACTORS ,[object Object],[object Object],[object Object],[object Object],[object Object]
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Unit 3. climate and living beings.ppt

  • 1. UNIT 3 CLIMATE AND LIVING BEINGS
  • 2. THE ATMOSPHERE The Earth's atmosphere is a thin layer of gases that surrounds the Earth. It is composed of 99% nitrogen and oxygen, and 1% of other gases. It is divided into layers as you can see in the picture. layer=capa surrounds=rodea
  • 3. 1. Troposphere .(0-10 km). The troposphere is the lowest region in the Earth's atmosphere. The weather and clouds occur in the troposphere. The temperature decreases as altitude increases. 2. Stratosphere. (10-50km) The earth's ozone layer is located in the stratosphere. This layer absorbs a lot of ultraviolet rays which are dangerous for human beings. Because of that temperature increases at this layer THE LAYERS OF THE ATMOSPHERE located=situado / absorb=absorber / ray=rayo / increase=aumentar / decrease=disminuir / layer=capa
  • 4. 3. Mesosphere . (50-80 km). Temperatures quickly decrease as height increases (about –90ºC). 4. Thermosphere : (80-500km). Temperatures rise again and it can exceed 1,000ºC 5. Exosphere. (500-1,280km). It is the last layer of the Earth's atmosphere. It separates the Earth from the outer space THE LAYERS OF THE ATMOSPHERE II outer space=espacio exterior include=incluir / rise (increase)=subir exceed=exceder / height=altura
  • 5.
  • 6. WHAT FACTORS AFFECT CLIMATE? There are 4 factors which affect temperature . These are summarised below: 1. Latitude Temperatures decrease as you move away from the equator. This is because the Sun’s rays are dispersed over a larger area of land than in the equator. In addition, polar regions are colder because the Sun’s rays have further to travel than on the equator. Sun rays go directly over the Equator areas, temperatures are higher there. move away=alejarse de / dispersed=extendidos / in addition=además / have further to travel=tienen que viajar más angle=ángulo /incoming=entrante / overhead=de pleno
  • 7. 3. Altitude Temperatures decrease with height. The air is less dense and cannot hold heat as easily. Temperatures rise 6ºC every 1,000 m high. 2. Water Currents Another important factor is the circulation of water and air. Warm air and water are transported up towards the poles, while cool air and water are transported down towards the equator. up/down towards=hacia arriba / abajo / cool=frío / while=mientras height=altura dense=denso hold=mantener heat=calor rise=subir
  • 8. 4. Distance from the sea Land heats and cools faster than the sea. Coastal areas have a lower temperature than inland areas. On the coast winters are mild and summers are cool. In inland areas temperatures are high in the summer and cold in the winter. What is the Greenhouse Effect? The greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere like water vapor, carbon dioxide, nitrous oxide, and methane trap energy from the sun. heat=calentarse / cool=enfriarse / inland=de interior / mild=suaves / cool=frescos / rise=subida experience=experimentar / trap=capturar
  • 9. WORLD CLIMATE ZONES According to latitude, the temperature of the air changes and we have different climate zones on earth: polar , temperate and tropical . POLAR. Average temperature 0º C all year. Lat (60º-90º N or S) TEMPERATE. Cold winters and mild summers (0º-20º C) Lat (30º-60º N or S) TROPICAL.Hot:dry or wet all year (on average over 20ºC) Lat (0º-30º N or S) Polar - very cold and dry all year Temperate - cold winters and mmild summers Arid - dry, hot all year Tropical - hot and wet all year Mediterranean - mild winters, dry hot summers Polar - very cold and dry all year Temperate - cold winters and mmild summers Arid - dry, hot all year Tropical - hot and wet all year
  • 10. PRECIPITATION . It is the water which falls to the earth in different forms: rain, snow, sleet or hail Precipitation occurs when water vapour cools. When the air reaches condensation point : the water vapour condenses and forms tiny droplets of water. These tiny droplets of water form clouds. Complex forces make the water droplets fall as rainfall. fall=caer / water vapour=vapor de agua / cool=enfriarse / reach=alcanzar / condense=condensarse / tiny droplets=gotitas / forces=fuerzas
  • 11. The following examples show three different ways air is cooled causing rainfall Warm wet air is forced to rise over high land. As the air rises it cools and condenses. Clouds form and precipitation occurs The sun heats the ground and warm air rises. As the air rises it cools and water vapour condenses to form clouds An area of warm air meets an area of cold air. The warm air is forced over the cold air . The warm air is cooled and water vapour condenses. Clouds form and precipitation occurs. Convectional Rainfall Warm wet air is forced to rise over high land.
  • 12. Rise=subir / over=sobre / cooler=más fresco / moist=húmedo / forced=forzado / high ground=tierra alta / shadow=sombra / expand= expandirse / cool=enfriarse TYPES OF RAINFALL
  • 13. ATMOSPHERIC PRESSURE Atmospheric pressure is the weight of air on the earth's surface. You can see pressure on a weather map with lines called isobars . Low pressure occurs when air becomes warmer. The air becomes lighter and it rises forming clouds and rain. Areas of low pressure are called depressions High pressure occurs when air becomes colder . The air becomes heavier and it sinks. Areas of high pressures are called anticyclones , as a result, we have cold clear days in winter and hot and sunny days in summer weight=peso / become=hacerse/ rise=ascender, subir depression=borrasca / sink=hundirse / measure=medir A barometer measures air pressure
  • 14. Wind is the movement of air masses from high pressure areas (highs) to low pressure areas (lows). A weather vane indicates the wind direction and an anemometer measures its speed in km/h. weather vane anemometer Anticyclones send out winds and they are attracted by depressions masses=masas / speed=velocidad / send out=enviar / attracted by=atraídos por                                                                           
  • 15.
  • 16. WEATHER HAZARDS AND CATASTROPHIES Caused by heavy winds: tornado hurricane Caused by heavy rains or by the absence of rain floods drought Caused by high temperatures Forest fire hazard=peligro
  • 17. WORLD CLIMATES wet=húmedo / dry=seco / cool=fresco / highlands=alta montaña below.
  • 18.
  • 19.
  • 20.
  • 21.
  • 22.
  • 23.