Density - Mass per Volume

The video explains how the density of substances changes with temperature and pressure, generally decreasing with higher temperatures and lower pressures. Water is an exception, being most dense at 4°C and becoming less dense as the temperature moves away from this point.

What factors affect the density of substances?

• Color and shape

• Temperature and pressure

• Volume and mass

• Height and width

What generally happens to the density of a substance when the temperature is increased?

• It fluctuates randomly

• It remains the same

• It decreases

• It increases

How does reducing pressure affect the density of a substance?

• Increases density

• Decreases density

• Causes density to fluctuate

• No effect on density

At what temperature is water most dense?

• 0°C

• 4°C

• 100°C

• 10°C

What happens to the density of water as the temperature moves away from 4°C?

• It increases

• It remains constant

• It decreases

• It becomes unpredictable