Spooky Lakes October 9th

What does "acidic" mean for water?

• A pH level = 7, that does not react with anything

• A pH level greater than 7, "basic", like soap or bleach

• A pH level less than 7, contains acids, can be like vinegar

• Water that is always solid and cannot be melted

What do we call a large, crater-like depression on top of a volcano?

• Caldera
• Fissure

• Vent
• Fumarole

Why does sulfur burn with blue flames?

• The temperature is so high, up to 600 Celsius

• The temperature is too chilly, below 0 Celsius

• Because of the altitude, ice gets mixed in

• Because it contains cobalt, a blue element

Why were the carbon dioxide (CO2) bubbles so deadly?

• CO2 will chill the blood too much

• Pure CO2 is very poisonous for humans to breathe in

• CO2 gas is heavier than oxygen, trapping people on the ground

• CO2 is lighter than air and humans would float up to the sun