What is evaporation?
It is when a liquid turns into a gas.
Explain the process of evaporation.
It happens because some particles in the liquid gain heat energy making them move faster and further apart until they escape from the surface of the liquid.
Name two factors that speed up evaporation.
wind and heat.
Name two ways that evaporation is useful.
Drying our hair, drying our clothes, making some kinds of food.
Give an example of a solute.
salt, sugar, coffee powder (any solid that can be dissolved)
Give an example of a solvent that we use everyday.
water.
What do we get when we mix a solute and a solvent?
A solution.
What happens to the solute when it is stirred into a solvent?
It dissolves.
What is condensation?
It is when a gas changes to a liquid.
Explain the process of condensation.
When gas particles cool down and lose energy they change into a liquid.
Where in the water cycle does evaporation happen?
Rivers, lakes, seas, and plants.
What are formed when water vapour condenses?
Clouds.
How does evaporated water get back to Earth?
It falls as rain or snow.
What is transpiration?
It is when water evaporates from the leaves of plants.
What is the boiling point of pure water?
100 degrees Celcius.
What do we call the temperature at which a liquid boils?
The boiling point.
