Unit 2. Social Science WEATHER AND CLIMATE COLEGIO MIRALBA

Transcription

1 Unit 2. Social Science WEATHER AND CLIMATE COLEGIO MIRALBA

2 1 WEATHER AND CLIMATE Weather and climate shape our lives in many different ways, from the clothes we wear to our everyday activities. We also depend on them for many things: farmers need rain for their crops; boats need strong winds for their sails and tourists like sunshine when on holiday. But what causes these conditions? Can we always predict them?

3 Weather map 1 1. Can you name any of the symbols on a weather map? 2. Which countries can you see on the maps? 3. What type of weather can we see on the maps? 4. Where was this photograph taken? Thinking routine What do I know about weather and climate? What do I intend to learn? What have I learnt? 2

4 Read the descriptions and select the correct picture. A School trip project Look at this chart project and answer the questions Pregunta 1 de 3 The season when temperatures are high and the weather is generally sunny in temperate climates. Comprobar respuesta 1. What season do you think it was when these notes were taken? Give reasons for your answer. 2. What is the weather like where you are? Use Ana and Tom s project to help you write a description. Then draw it in your notebook. 3

5 2 Weather Weather describes all the atmospheric conditions in a place each day. Weather can change several times in a day. Water, air and heat from the Sun work together to form weather. We talk about four different factors when we talk about weather: temperature humidity wind precipitation 4

6 Temperature Humidity Temperature is a measure of how hot or cold the air is. We use a thermometer to gauge this. Thermometers can have two different types of scales: The Celsius or Centigrade (oc) temperature scale, where freezing is at 0 oc. The Fahrenheit (of) scale, where freezing is at 32 of. Humidity describes how much water vapour is present in the air. When it is very humid, fog and mist can form. We use a hygrometer to measure humidity. 5

7 Wind Wind is moving air that can move at many different speeds. The first international standard for measuring wind speed was created by Admiral Beaufort in It includes categories such as breeze, gale or hurricane, an is still widely used today. We use an anemometer to measure wind speed. 6

8 Precipitation Activities 1. What are the main components of weather? 2. What happens when there is a lot of humidity in the air? 3. Name the two temperature scales. Then find out who invented each one. Did they invent anything else? 4. Find out the average wind speed for the last week where you live and place it on the Beaufort Wind Scale. 5. What are the other six categories in the Beaufort Wind Scale? Precipitation is water that falls to the ground from the atmosphere. It can fall as a liquid, such as rain, or as a solid, such as snow or hail. To measure precipitation we use a rain gauge. 7

9 Precipitation We talk about precipitation when water is released from clouds in the form of rain, drizzle, sleet, hail or snow. The conditions inside the cloud and the temperature outside it determine what form of precipitation is released. Rain Rain is the name given to water droplets that measure more than 0.5 mm across. Drizzle Smaller rain droplets form drizzle, a light rain. Hail Hail forms when water droplets are pushed up by rising air currents in thunderstorms. They freeze in the clouds and then start to fall again. As they fall they melt slightly. Bigger stones are created when water droplets are pushed up again and refreeze. Snow If the cloud is low and the air around it is cold and dry, the little droplets inside form ice crystals, which fall as snow. Sleet If the air is a little cooler, frozen crystals can form. This results in a mixture of rain and snow, which we call sleet. 8 Activities 1.. When does precipitation fall as a solid and when does it fall as a liquid? 2. How does hail form? 3. If a water droplet measures 0.7 mm across, is it rain or drizzle? Explain your answer.

10 Clouds Clouds form when warm air rises and then cools down. Different types of clouds result in different types of weather. These clouds form in layers and are located low in the sky. They often bring drizzle and fog. Cirrus clouds Cumulus clouds These are fat, fluffy clouds and are a sign of good weather. These clouds are thinner and are located higher up in the sky. They usually mean that bad weather is coming. Stratus clouds Activities 1. Draw the clouds that you can see outside now. What sort of weather do you predict for later? 2. Find out about other types of clouds that do not appear on this page. What are they called? 9

11 Predicting the weather Professional meteorologists predict weather by using hundreds of measuring devices to collect information about: rainfall temperature sunshine wind speed There are around weather stations all over the world. They send reports to weather forecast centres to pass on data about wind speed, temperature and more. Weather satellites orbit the Earth so they can take pictures of weather patterns, monitor temperatures and even measure the height of waves. Weather balloons carry instruments high into the atmosphere so they can measure temperature, air pressure and humidity. They then send their readings to a weather station on the ground. Once we have a data, we can put it into temperature and precipitation graphs to help us interprent the information and make predictions. 10

12 Activities 1. How can a meteorologist monitor rainfall? 2. What do we use to take pictures of weather from above? 3. Why do we use weather balloons? Rain gauge Plastic bottle Ruler Paper clips Scissors Adhesive tape Jelly Anemometer Make your own metereological instruments Make a wind vane 2 paper plates Poster board Plastic straw Straight pin Pencil with new eraser Modelling clay Glue Scissors 2 long strips of corrugated cardboard (35 cm). 4 polystyrene cups Plasticine A pushpin Pencil with new eraser Colored marker Stappler Scissors Thermometer Glass bottle Food coluoring Plasticine Straw Water Rubbing alcohol 11

13 Hygrometer A long hair (the best is horse hair) Two pushpins Cardboard Adhesive tape Barometer Jar Rubber band Balloon Glue Tape Card Needle Straw Pencil Marker pen Scissors 12

14 Weather forecasts We use the data collected from the devices mentioned on the previous page to predict weather patterns for the near future. We can see these weather forecasts on TV, the internet, in newspapers or hear about them on the radio. We use weather maps with symbols to show visual predictions. Weather can affect all aspects of our lives. This includes factors such as the economy and our health. For example, if a hail storm destroys crops, the price of food increases. If there is little rain, there are more droughts and pollution levels increase. Activities 1. Find out about different types of extreme weather that can affect Europe. How can we prepare for them? 2. Discuss how weather patterns affect our everyday lives. 3. Find out about different types of extreme weather that can affect Europe. How can we prepare for them? 4. Discuss how weather patterns affect our everyday lives. 5. Explain these weather maps. This is why it is so important to be able to predict the weather. Did you know? In the summer of 2003 Europe experienced a two-month heatwave. Temperatures rose to highs of nearly 39 oc in Madrid, and up to 48 oc in the south of Spain. This resulted in a higher number of deaths than usual and a significant drop in economic activity, especially in farming. 13

15 Weather Reports Expressions used in a weather report: Weather symbols it's hot it's warm it's cold it's sunny/sunny with cloudy periods it's cloudy/ partly cloudy/mostly cloudy/ the sky is overcast it's windy/threre is/a strong wind/ there are light winds/ there are strong winds it's foggy it's stormy it's raining it's hailing it's snowing temperatures are going to drop (go down quickly) temperatures are going to rise (go up quickly) temperatures are below zero 14

16 Activities 1. What factors determine the different world climates? 2. Why is the weather so cold in polar climates? When and why do they receive very little daylight? 3 Climate Climate is the main weather conditions for a long Polar climates are cold all year around. Winter period of time in a specific area. There are three brings darkness and temperatures as low as main climate categories which are determined by: -50º C. The size and location of landmasses In summer the Sun barely sets, but it lies so low in the sky that its rays hit the land at a weak angle. The presence of mountains and plains This is why it is still so cold in summer. Atmospheric wind systems Ocean currents Temperate climates have mild weather with hot summers and cold winters. The most densely populated parts of the world lie in this region. Tropical climates are warm all year round and have rainy seasons. Countries with this climate lie between the Tropic of Cancer and the Tropic of Capricorn. This is where we can find tropical rainforests. 15

17 Climates in Spain Climates in Spain There are five types of climate in Spain. Oceanic climates. Mountain climates Mediterranean climates. Mediterranean-Continental climates. Subtropical climates. Desert climates. Oceanic climates are mild and rainy. We can find them in areas such as Galicia, Cantabria and the western Pyrenees. 16

18 Activities 1. What type of climate does your region have? 2. Which plants, trees and animals are typical of the climate where you live? 17

19 Think about it: pollution Pollution is becoming a great problem for our world today. Urban living and modern technology threaten our world in various ways, from the hole in the ozone layer to bad air quality and polluted water. This not only affects us, but also plants and wildlife around the world. Global Warming Examples of pollution 1. Acid rain damages trees buildings and statues. 2. Heavy exhaust fumes from cars can cause thick smog. This can make difficult to breathe in urban areas. Air Pollution 3. A hole in the ozone layer is growing due to chemicals released by aerosols, fridges and air-conditioning units. 4. Scientists fear that the rising level of carbon dioxide in the atmosphere is trapping the Sun's heat and causing a gradual warming of the world's climates. This is called global warming. Water Pollution 18

20 Activities 1. Find out more about the ozone layer. What is it? Why is it important? 2. What type of pollution do you think affects your area most? Give reasons for your answer. 3. Find out which cities have the worst levels of air pollution and why. 4. Create a poster with the problems of pollution and the way to reduce or prevent it. Then explain it to your classmates. Time: 1 session, materials: cardboards, realia, photos, drawings... 19

21 Mr Blue Sky (by ELO) Sun is shinin' in the sky There ain't a cloud in sight It's stopped rainin' ev'rybody's in a play And don't you know It's a beautiful new day hey,hey Runnin' down the avenue See how the sun shines brightly in the city On the streets where once was pity Mister blue sky is living here today hey, hey Mister blue sky please tell us why You had to hide away for so long Where did we go wrong? Hey you with the pretty face Welcome to the human race A celebration, mister blue sky's up there waitin' And today is the day we've waited for Hey there mister blue We're so pleased to be with you Look around see what you do Ev'rybody smiles at you Mister blue sky, mister blue sky Mister blue sky Mister blue, you did it right But soon comes mister night creepin' over Now his hand is on your shoulder Never mind I'll remember you this I'll remember you this way Mister blue sky please tell us why You had to hide away for so long Where did we go wrong? Hey there mister blue We're so pleased to be with you Look around see what you do Ev'rybody smiles at you xx

22 Final Review Final Review Quiz Are you ready to check your learning? xxi