Oct 31 Science Review Video

What is the fog produced when dry ice is added to water?

• Pure carbon dioxide gas

• Water vapor only

• A mixture of carbon dioxide and water vapor

• Liquid carbon dioxide

Why do the dry ice bubbles not float in the air?

• They are too large

• Carbon dioxide is heavier than air

• The soap solution makes them dense

• They are filled with water

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What causes the pumpkin to explode in the experiment?

• The pumpkin rotting

• The bottle overheating

• Pressure building up inside the bottle from sublimating dry ice

• A chemical reaction between the pumpkin and dry ice

Which scientific principle explains how fast-moving air can create lift, as demonstrated with the toilet paper?

• Newton's Third Law

• Archimedes' Principle

• Bernoulli's Principle

• Pascal's Law

Why is the exploding pumpkin considered a physical change?
+ Answer the question

+give an example of a physical and chemical change