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3. 2. 1. Write down three observations. Write down two observations. a nd an inference. Example : There are three candles. Why did the candles blow out?. Let’s investigate a similar situation…. Lake Nyos, 1986. Where is Cameroon?. Cameroon is located under a region of volcanic activity. - PowerPoint PPT Presentation
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Write down three observationsand an inferenceWrite down two observationsExample : There are three candles
Why did the candles blow out?
Let’s investigate a similar situation…
Where is Cameroon?• Cameroon is located under
a region of volcanic activity
Where is Cameroon?
• The volcanic activity created a chain of islands• The volcanic
activitycreatesvolcanoeson land
What is a volcano?
• Magma rises up, cutting a cylinder in the Earth
• When it reaches the surface, it may cut a hole in the surface and erupt lava and rock
How did Lake Nyos form?
• Magma may hit wet rock and explode, causing craters
• These cratersmay fill up with water
Carbon DioxideCarbon Dioxide Carbon Dioxide
Carbon Dioxide
CO2CO2
CO2
CO2
CO2
Carbon Dioxide is denser than Oxygen…
O2 O2O2
O2 O2
CO2 = Carbon DioxideO2 = Oxygen
CO2
CO2
CO2CO2
O2
O2O2
O2
O2
EXTRA SLIDES
Carbon dioxide demonstration with balloon and water bottle
Lake Nyos
• http://www.bbc.co.uk/science/earth/collections/worst_natural_disasters#p00gttdwstop at 1:59?
