Turn in... 6-1 R/R. Warm-Up List the 3 causes of volcanoes. Be prepared to describe each.

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Presentation transcript:

Turn in R/R

Warm-Up List the 3 causes of volcanoes. Be prepared to describe each.

Volcanic Activity Section 9-2

Anatomy of a Volcano Magma Chamber Pipe Vent Side Vent Crater Lava Flow

Factors affecting eruption Why does this soda “erupt”? Video #1 Video #2

Dancing Raisins Try whole raisins. Try raisins cut in ½. Try different beans. Pour liquid into strainer in rear sink. Return pan of materials to the front.

Dancing Raisins Why do the Raisins dance?

Factors affecting eruption #1. amount of gas dissolved in magma ↑ gas content = ↑ force of eruption

#2. temperature ↑ temperature = ↑ flow-y

Very hot, liquidy

Cooler, less flow-y

Factors affecting eruption #3. amount of silica in magma Silica = thicker lava

Lava with lots of silica. THICK! – the rock builds up

Lava without lots of silica. THIN and runny!

List 3 factors which affect a volcanic eruption. Which one is hardest for you to remember? How can you compensate for that?

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