 |
Put a little soil in a jug or large jar
and add water. Stir the mixture to make muddy water.
|
| |
|
 |
Put the muddy water into the washing-up
bowl to a depth of about 10 centimetres.
|
| |
|
 |
Cover the bowl with cling film or clear
plastic sheeting and seal the edges with sticky tape.
|
| |
|
 |
Put a small marble or pebble in the middle
of the plastic sheeting so that it makes a slight
hollow.
|
| |
|
 |
Stand the bowl out in the sun. Look at it
carefully over the next two to three hours. What has happened?
Explain what you see. Use these words in your explanation: heat;
sun; evaporates; condenses; and rain.
|
