Front

What is the definition of density?

Back

Density is the amount of matter in a certain amount of space, typically expressed as mass per unit volume.

Front

At what temperature does water start to boil?

Back

Water starts to boil at 212°F (100°C) under standard atmospheric pressure.

Front

What is the process called when a liquid changes states into a gas?

Back

The process is called evaporation.

Front

What are physical properties?

Back

Physical properties are characteristics of matter that can be observed with the five senses or measured, such as color, odor, mass, volume, and state.

Front

What is condensation?

Back

Condensation is the process when a gas cools and changes into a liquid.

Front

What is the relationship between temperature and the state of matter?

Back

Temperature affects the state of matter; increasing temperature can cause solids to melt into liquids and liquids to evaporate into gases, while decreasing temperature can cause gases to condense into liquids and liquids to freeze into solids.

Front

What is the boiling point of water in Celsius?

Back

The boiling point of water in Celsius is 100°C.

Front

What is evaporation?

Back

Evaporation is the process by which molecules in a liquid gain enough energy to enter the gaseous state.

Front

Can physical properties be measured?

Back

Yes, physical properties can be measured using various tools and techniques, such as rulers for length, scales for mass, and thermometers for temperature.

Front

What happens to the density of a substance when it is heated?

Back

When a substance is heated, its density typically decreases because the substance expands and occupies a larger volume.