Page 94 - science
P. 94
Making and testing a rain gauge
1 Make a rain gauge by using the top of a plastic bottle.
2 Add some pebbles to the bottle and add water until they are covered.
3 Turn the top of the bottle over to be a funnel.
4 Tape a ruler to the side of the bottle. Make sure the 0 of the ruler is
level with the top of the water you added.
5 Place your rain gauge outside. Choose a place that is open to the sky
but not too windy.
6 Check your rain gauge every day.
7 Write down the rainfall in a table like Be a scientist
this one. Scientists take readings
regularly. This is so that
Amount of rainfall no water evaporates from
Day
(in millimetres) the gauge and changes
the results. This helps to
make their results fair.
8 Talk about any patterns you see in
your results. page 8 5 Plants and the Seasons
Key idea
Special instruments can be used to measure the
weather.
95
■ For more activities, go to Workbook 1 page 95.
