A jar of water was boiled. After some time, steam was seen coming out of the container. [2 MARKS]
(1) What is the process called?
(2) What kind of change is this?

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Solution

Each point: 1 Mark

1) Evaporation is the process of loss of water as water vapour from the surface of water.
2) Evaporation is a physical change. When the water vapour is allowed to be cooled, its physical state changes back to liquid form.

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A jar of water was boiled. After some time, steam was seen coming out of the container. [2 MARKS] (1) What is the process called? (2) What kind of change is this?

Each point: 1 Mark 1) Evaporation is the process of loss of water as water vapour from the surface of water. 2) Evaporation is a physical change. When the water vapour is allowed to be cooled, its physical state changes back to liquid form.

A jar of water was boiled. After some time, steam was seen coming out of the container. [2 MARKS]
(1) What is the process called?
(2) What kind of change is this?

Each point: 1 Mark

1) Evaporation is the process of loss of water as water vapour from the surface of water.
2) Evaporation is a physical change. When the water vapour is allowed to be cooled, its physical state changes back to liquid form.