1 2 3 Write down three observations and an inference Write down two observations Example : There are three candles.

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Presentation transcript:

1 2 3 Write down three observations and an inference Write down two observations 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

Where is Cameroon? The volcanic activity created a chain of islands The volcanic activity creates volcanoes on 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 craters may fill up with water

Carbon Dioxide

CO 2 Carbon Dioxide is denser than Oxygen… O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 CO 2 = Carbon Dioxide O 2 = Oxygen

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2

EXTRA SLIDES

Carbon dioxide demonstration with balloon and water bottle

Lake Nyos ns/worst_natural_disasters#p00gttdw stop at 1:59? ns/worst_natural_disasters#p00gttdw