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Pertanyaan
Read the following text and answer the question!
A barometer is used for measuring air pressure. It is a useful tool for helping predict weather changes.
What you'll need:
Instructions:
What's happening?
When there is low air pressure the balloon should expand out and the straw will point down. This is because the air inside the balloon now has relatively more air pressure compared to the air outside, it pushes the balloon out as a result.
When there is high air pressure the air on the outside will push the balloon into the jar and the
straw will point upwards. The air inside the balloon now has relatively less pressure, this pushes the balloon inwards as a result.
In general, high air pressure indicates fair weather while low air pressure indicates that bad
weather is more likely. Although forecasting the weather isn't an exact science and can be very
difficult at times, give it a go and see how accurate you are.
(Adopted from: http://www.sciencekids.eo.nz/projects/barometer.html (April 23, 2019))
"... and hold it in place with a rubber band." (Step 2)
The word 'it' refers to ____.
the jar
the balloon
the barometer
the rubber band
the top
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N. Hariri
Master Teacher
Mahasiswa/Alumni Universitas Negeri Malang
23
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