Lesson 8 How does evaporation happen?

Lesson 8 How does evaporation happen?

There are 3 states of matter : solid, liquid and gas.

Evaporation is changing from liquid to gas state. Evaporation happens above the 0^⁰ Celcius.

Open Ended

What are states of matter?

Multiple Choice

What is Evaporation ?

• it is changing from solid to liquid.

• it is changing from liquid to solid.

• it is changing from liquid to gas.

• it is changing from gas to liquid.

The liquid water evaporates and becomes a gas (water vapour). Matter doesn’t disappear. It just changes state from a liquid to a gas. 

For example,Natural evaporation happens when the sun heats the water in a puddle and it evaporates.

Artificial evaporation

it happen by fire and heater. when we put a pan , water in pan evaporates.

Open Ended

* What causes natural evaporation?

Open Ended

What causes artificial evaporation?

Open Ended

* How else can we cause evaporation?

Different liquids evaporate at different rates. 

These liquids will all evaporate at different rates because they have different properties. One of the properties that affects the rate of evaporation is the boiling point of the liquid. 

Multiple Choice

which one does affect rate of evaporation?

• freezing point

• condensation point

• boiling point

• melting point

Open Ended

Which liquid do you think will evaporate the fastest? Why?

Open Ended

Which liquid do you think will evaporate the slowest? Why?

Open Ended

Do you think water or salt water will evaporate more quickly? Why?