14.6 Global warming

• Biologie
• Middelbare school
• vwo
• Leerjaar 3

14.6 Global warming

Learning objective

You will learn what the consequences of global warming are for sea levels, the weather, and for nature.

Schedule:

• Welcome
• Learning objective
• Instruction
• Assignments
• End of class

What was the average temperature in the Netherlands in 2017?

1. 9°C
2. 11°C
3. 13°C
4. 15°C

Does deforestation contribute to global warming?

1. No, trees aren't that important
2. Sometimes because only the cutting down of Maple trees contributes to global warming
3. No, deforestation adds methane to the atmosphere, which makes the Earth cooler
4. Yes; less trees means less CO2 is turned into oxygen.

Climates are changing ______ global warming.

1. in spite of
2. as a result of
3. as well as

Climate = average weather conditions in a certain area over a longer period of time

Over the past century average temperature has risen by 0.9 degrees

Causes for a rise in temperature

Natural fluctua (ice ages and warmer periods of time)

Enhanced greenhouse effect

• clear evidence: highest CO2 levels in 800.000 years
• due to fossil fuels and deforestation
  

Woodland loss and woodland gain between 1990 and 2015 

Consequences: 1 Rising sea levels

Arctic ice cap and the Greenland and Antarctic ice sheets are melting. 

Consequences: 1 Rising sea levels

Glaciers are gradually retreating as well

Consequences: 1 Rising sea levels

The sea level has already increased by 20cm

Problem for low-lying countries (especially in tropical areas)

Consequences: 2 Shifting climate zones

Climate zone = a large area with more or less the same climate

Desertification = some areas are changing into deserts due to higher temperatures

Consequences: 3 More frequent bouts of extreme weather

Floods (caused by heavy rainfall, storms, or long-term droughts). 

Higher temperature -> more water evaporation ->more rainfall 

warm seawater -> increase in the number of storms and hurricanes.

great tit eggs hatch in april, caterpillars in may

earlier hatching

Consequences: 4 Nature changes

Consequences: 4 Nature changes

exotic = organism that has settled in a country or area that was not its original habitat

oak processionary moth

filter fly

What?	Make: 14.6 assignments 1-11
How?	Work in your book. You may consult in a whisper.
Help?	Ask your neighbour first. Then raise your hand to ask me.
Time?	10-15 minutes
Finished?	Check your answers. Study for the big test.