Scientific Principles PPT 3 - Properties of Water

What is the chemical formula for water?

• H2O

• CO2

• NaCl

• O2

Why is it rare to find pure water?

• Water is a weak solvent.

• Water is a powerful solvent.

• Water is a solid at room temperature.

• Water is a gas at room temperature.

What can water do over time to almost anything?

• Freeze, melt, evaporate

• Erode, corrode, absorb

• Burn, ignite, explode

• Harden, solidify, crystallize

What happens to water when it is heated up to 100°C?

• It contracts by 4%

• It expands by 4%

• It turns into ice

• It remains the same

When water exceeds 100°C, what does it turn into?

• Ice

• Liquid

• Steam

• Gasoline

By how much can water expand when it turns to steam at temperatures exceeding 100°C?

• 100 times its original volume

• 500 times its original volume

• 1,600 times its original volume

• 10 times its original volume

What is the unit of temperature commonly used to measure the effect of heat on a space or object?

• Kelvin

• Fahrenheit

• Celsius

• Rankine

Which temperature scale is often used to measure an increase in temperature?

• Celsius

• Kelvin

• Fahrenheit

• Rankine

What is the equivalent of 0 Kelvin in degrees Celsius?

• 0°C

• -273°C

• 273°C

• -100°C

What happens to molecular bonds as water is heated?

• They strengthen and molecules move closer.

• They weaken and molecules become more active.

• They remain unchanged.

• They disappear completely.