Physics of Water and Ice

Ruthel and Priya's holiday in Norway leads to a lesson on the anomalous behavior of water. They observe fish swimming under a frozen lake surface and a burst water bottle. Priya explains that water expands when it freezes below 4°C, causing ice to float and bottles to burst. This unique property allows fish to survive under ice. Ruthel learns the importance of applying physics knowledge in real life.

What activity did Ruthel and Priya engage in during their holiday in Norway?

• Snowboarding

• Mountain climbing

• Ice fishing

• Skiing

What surprised Ruthel about the frozen lake?

• The ice was melting

• Fish were swimming under the frozen surface

• The lake was warmer than expected

• The lake was completely frozen solid

Why did the plastic bottle filled with water burst?

• The cap was not sealed properly

• The bottle was dropped

• The water inside expanded upon freezing

• The bottle was defective

What phenomenon allows fish to survive in a frozen lake?

• The lake never freezes

• Fish generate their own heat

• Fish can breathe ice

• Ice floats due to lower density, keeping water below warmer

At what temperature does water start to expand instead of contract?

• 10 degrees Celsius

• 4 degrees Celsius

• 100 degrees Celsius

• 0 degrees Celsius

What is the term used to describe water's expansion below 4 degrees Celsius?

• Thermal expansion

• Anomalous behavior

• Normal behavior

• Thermal contraction

What does Priya say about objects in general when they are cooled?

• They expand

• They contract

• They remain the same

• They change color

How does Ruthel explain the bursting of the bottle?

• The bottle was too old

• The bottle was not sealed properly

• The water expanded upon freezing, exerting pressure

• The bottle was exposed to sunlight

What lesson does Priya emphasize about understanding physics?

• Physics is only theoretical

• Physics should be applied in real life

• Physics is not important

• Physics is only for scientists

What did Ruthel note in his diary about the significance of physics?

• Physics is only for entertainment

• Physics is not useful

• Physics is significant when applied in real life

• Physics is only for academic purposes