Sc1 Skills for Key Stage 3 © Pearson Education Limited 2004 Unit 8F Compounds & Mixtures...
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Sc1 Skills for Key Stage 3 © Pearson Education Limited 2004 Unit 8F Compounds & Mixtures Investigating evaporation Anya wanted to investigate the rate of evaporation of water. She took a beaker and filled it with 10 cm 3 of water. She then placed the beaker in an oven at 20 0 C for one hour. At the end of this time she measured the volume of water remaining.
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Transcript of Sc1 Skills for Key Stage 3 © Pearson Education Limited 2004 Unit 8F Compounds & Mixtures...
Sc1 Skills for Key Stage 3
© Pearson Education Limited 2004
Unit 8F Compounds & Mixtures
Investigating evaporationAnya wanted to investigate the rate of evaporation of water.
She took a beaker and filled it with 10 cm3
of water.
She then placed the beaker in an oven at 200C for one hour.
At the end of this time she measured the volume of water remaining.
Sc1 Skills for Key Stage 3
© Pearson Education Limited 2004
Unit 8F Compounds & Mixtures
Anya then repeated the investigation at four higher temperatures. Finally, the whole investigation was repeated a further two times. The table shows the data gained:
Volume of water in beaker after 1 hour (cm3)
Temperature of oven (°C)
Test 1 Test 2 Test 3 Average
20 10 10 10 10.0
40 9 6 10 8.3
60 8 8 8 8.0
80 6 6 5 5.7
100 2 1 0 1.0
Sc1 Skills for Key Stage 3
© Pearson Education Limited 2004
Unit 8F Compounds & Mixtures
a) Name the independent variable.
Oven temperature
Volume of water in beaker after 1 hour (cm3)
Temperature of oven (°C)
Test 1 Test 2 Test 3 Average
20 10 10 10 10.0
40 9 6 10 8.3
60 8 8 8 8.0
80 6 6 5 5.7
100 2 1 0 1.0
Sc1 Skills for Key Stage 3
© Pearson Education Limited 2004
Unit 8F Compounds & Mixtures
b) Name the dependent variable.
Water left in beaker after 1 hour
Volume of water in beaker after 1 hour (cm3)
Temperature of oven (°C)
Test 1 Test 2 Test 3 Average
20 10 10 10 10.0
40 9 6 10 8.3
60 8 8 8 8.0
80 6 6 5 5.7
100 2 1 0 1.0
Sc1 Skills for Key Stage 3
© Pearson Education Limited 2004
Unit 8F Compounds & Mixtures
c) Describe the pattern you can see in these results.
Volume of water in beaker after 1 hour (cm3)
Temperature of oven
(°C)
Test 1 Test 2 Test 3 Average
20 10 10 10 10.0
40 9 6 10 8.3
60 8 8 8 8.0
80 6 6 5 5.7
100 2 1 0 1.0
As the temperature of the oven increased, the volume of water left in the beaker after 1 hour decreased.
Sc1 Skills for Key Stage 3
© Pearson Education Limited 2004
Unit 8F Compounds & Mixtures
d) Predict the volume of water that would beleft in the beaker if the temperaturewas 30°C.
Any number between 8.3ml and 10ml.
Volume of water in beaker after 1 hour (cm3)
Temperature of oven (°C)
Test 1 Test 2 Test 3 Average
20 10 10 10 10.0
40 9 6 10 8.3
60 8 8 8 8.0
80 6 6 5 5.7
100 2 1 0 1.0
