The fog

Fig 1: Cycling in the fog.

	Fog is a thick cloud of water droplets which hangs just above the ground. When the air near the ground cools down you can expect fog. Fog often forms at night and goes away during the day.
Fig 2: Walking in the fog.

When warm air passes over a cool sea, the air is cooled down and forms a sea mist or fog.
	Fig 3: A ship and lighthouse.

	Hill fog is caused by damp air being swept up onto hill tops.
Fig 4: Hilltops showing above the fog.

Smog is fog and smoke mixed together.
	Fig 5: Cars driving in the fog.

Things to do

Imagine that you are out in the fog. What kind of sounds might you hear?

Draw a picture of a hat and a coat. Colour them in using safety colours. These are colours that can be seen more clearly in the fog.

What kind of things can you do to help you be seen in the fog?

Do you like fog?

What kind of weather do you like?

Here is a weather song for you to sing:

In all kinds of weather
Whether it's hot or cold
Wouldn't it be nice if we could make
The weather do what it's told?

To make the fog
Let's all wiggle our fingers
Wiggle our fingers
Wiggle our fingers

Fig 6: Scissors and card

Fig 7: Shining a torch.

Cut our three small circles of card. Stick a piece of blue paper onto one, a piece of red onto another and a piece of yellow paper onto the third.

Ask someone to stand at the other end of the classroom. Hold up each circle. Find out which one is easiest to see. Try the same tests in a darkened room. This time shine a torch on each one.

Make your own set of reflectors using some bright safety colours.

For the record

Make a list of the things you can see and hear in the playground on a foggy day.

Did you know?

Fog is defined as cloud which reduces visibility to less than 1,000 m.

Fog can form after it gets dark on fine days, when there is no wind.