Scientific Principles PowerPoint 2

What is the boiling point of water at sea level?

• 100°C

• 90°C

• 80°C

• 70°C

What is the freezing point of water in Kelvin?

• 273K

• 100K

• 0K

• 373K

What is the process called when a liquid turns into a gas?

• Freezing

• Condensation

• Evaporation

• Sublimation

At what temperature does water typically freeze?

• 100°C

• 0°C

• 50°C

• 25°C

What is the process called when a gas turns into a liquid?

• Evaporation

• Freezing

• Condensation

• Melting

By how much does water expand from 4°C to 99°C?

• 2%

• 4%

• 6%

• 10%

How much does ice expand when it freezes?

• 5%

• 10%

• 15%

• 20%

How many times does steam expand compared to water?

• 1,000 times

• 1,200 times

• 1,600 times

• 2,000 times

What happens to water when it is heated?

• It contracts.

• It expands.

• It remains the same.

• It evaporates immediately.

What happens to water when it exceeds 100°C?

• It turns to ice.

• It remains liquid.

• It turns to steam and expands significantly.

• It condenses.