Evaporation
Science: KS3, topic 3.2.30
Evaporation
Evaporation is when a liquid changes into a gas.
Evaporating
- Evaporation is the process in which a liquid turns into a gas or vapour.
- Evaporation requires an increase in energy.
Condensation
- If a gas is cooled down, the gas or vapour turns back into liquid.
- The change back into a liquid is called condensation.
Real-life evaporation examples
- During exercise, our body temperature rises.
- The rise makes us sweat.
- Evaporating sweat takes away body heat.
- Losing this heat cools us down.
Hand sanitiser evaporation
- During the COVID-19 pandemic, lots of people used hand sanitiser.
- Hand sanitiser evaporates fast off your hands.
- So your hands feel cooler.
Test yourself on Evaporation
What is true about evaporation?
We see many examples of evaporation in the world around us, which statements are true about evaporation?
What would happen if sweat stayed on your skin instead of evaporating?
What will happen to a liquid that does not gain any extra energy?