The Reading / Listening - Cold Air - Level 5

We learn at school that warm air rises and cool air sinks. This is a basic principle of science. A study from the University of California found there are circumstances in which cool air rises. Researchers found that in tropical areas, cold air rises because of the lightness of water vapour. In warm, humid climates, water particles become more buoyant and can help cool air rise. The lead researcher said: "Water vapour has a buoyancy effect which helps release the heat of the atmosphere to space and reduce the degree of warming. Without this lightness...climate warming would be even worse."



Scientists say humid air is lighter than dry air at the same temperature and pressure. This is called the vapour buoyancy effect. Cooler air containing water droplets rises to form clouds and thunderstorms. Rain has a cooling effect in tropical areas. More research is needed to find out the effects rising cool air has on limiting global warming. A researcher said: "Now that we understand how the lightness of water regulates tropical climate, we plan to study whether global climate models accurately represent this effect."

Try the same news story at these levels:

    Cold Air - Level 4 or  Cold Air - Level 6

Sources
  • https://www.sciencedaily.com/releases/2020/05/200506162159.htm
  • https://phys.org/news/2020-05-cold-air-riseswhat-earth-climate.html
  • https://advances.sciencemag.org/content/6/19/eaba1951


Make sure you try all of the online activities for this reading and listening - There are dictations, multiple choice, drag and drop activities, crosswords, hangman, flash cards, matching activities and a whole lot more. Please enjoy :-)



Phrase Matching

Paragraph 1

  1. We learn at school that
  2. This is a basic principle
  3. circumstances in which cool
  4. the lightness of water
  5. water particles become more
  6. release the heat
  7. reduce the degree
  8. climate warming would be
  1. air rises
  2. of warming
  3. buoyant
  4. even worse
  5. of science
  6. warm air rises
  7. vapour
  8. of the atmosphere

Paragraph 2

  1. humid air is lighter
  2. at the same temperature
  3. This is called the vapour
  4. Cooler air containing water
  5. form clouds and
  6. the effects rising
  7. the lightness of water regulates
  8. global climate
  1. models
  2. buoyancy effect
  3. thunderstorms
  4. cool air has
  5. than dry air
  6. tropical climate
  7. and pressure
  8. droplets

Listening — Listen and fill in the gaps

We learn at school that (1) ___________________ and cool air sinks. This is a (2) ___________________ science. A study from the University of California found there are circumstances in which cool air rises. Researchers found that (3) ___________________, cold air rises because of the lightness of water vapour. In warm, humid climates, water particles (4) ___________________ and can help cool air rise. The lead researcher said: "Water vapour has a buoyancy effect which helps (5) ___________________ of the atmosphere to space and reduce the degree of warming. Without this lightness...climate warming would (6) ___________________."

Scientists say (7) ___________________ lighter than dry air at the same temperature and pressure. This is called the vapour buoyancy effect. Cooler air containing water droplets (8) ___________________ clouds and thunderstorms. Rain has a cooling (9) ___________________ areas. More research is needed to find out the (10) ___________________ air has on limiting global warming. A researcher said: "Now that we understand how (11) ___________________ water regulates tropical climate, we plan to study whether global climate models accurately (12) ___________________."

Put a slash (/) where the spaces are

Welearnatschoolthatwarmairrisesandcoolairsinks.Thisisabasicprinc
ipleofscience.AstudyfromtheUniversityofCaliforniafoundtherearecir
cumstancesinwhichcoolairrises.Researchersfoundthatintropicalare
as,coldairrisesbecauseofthelightnessofwatervapour.Inwarm,humid
climates,waterparticlesbecomemorebuoyantandcanhelpcoolairrise.
Theleadresearchersaid:"Watervapourhasabuoyancyeffectwhichhel
psreleasetheheatoftheatmospheretospaceandreducethedegreeofw
arming.Withoutthislightness...climatewarmingwouldbeevenworse.
"Scientistssayhumidairislighterthandryairatthesametemperaturea
ndpressure.Thisiscalledthevapourbuoyancyeffect.Cooleraircontaini
ngwaterdropletsrisestoformcloudsandthunderstorms.Rainhasacool
ingeffectintropicalareas.Moreresearchisneededtofindouttheeffectsr
isingcoolairhasonlimitingglobalwarming.Aresearchersaid:"Nowthat
weunderstandhowthelightnessofwaterregulatestropicalclimate,we
plantostudywhetherglobalclimatemodelsaccuratelyrepresentthiseff
ect."

Student survey

Write five GOOD questions about this topic in the table. Do this in pairs. Each student must write the questions on his / her own paper. When you have finished, interview other students. Write down their answers.

(Please look at page 12 of the PDF to see a photocopiable example of this activity.)

Discussion — Write your own questions

STUDENT A’s QUESTIONS (Do not show these to student B)

(a) ________________

(b) ________________

(c) ________________

(d) ________________

(e) ________________

(f) ________________

(g) ________________

(h) ________________

STUDENT B’s QUESTIONS (Do not show these to student A)

(i) ________________

(j) ________________

(k) ________________

(l) ________________

(m) ________________

(n) ________________

(o) ________________

(p) ________________





Free writing

Write about this topic for 10 minutes. Comment on your partner’s paper.

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Answers

(Please check your answers against the article above.

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