Sc1 Skills for Key Stage 3 © Pearson Education Limited 2004 Unit 8F Compounds & Mixtures Investigating evaporation Anya wanted to investigate the rate.

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Presentation transcript:

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.

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 (cm 3 ) Temperature of oven (°C) Test 1Test 2Test 3Average

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 (cm 3 ) Temperature of oven (°C) Test 1Test 2Test 3Average 

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 (cm 3 ) Temperature of oven (°C) Test 1Test 2Test 3Average

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 (cm 3 ) Temperatur e of oven (°C) Test 1Test 2Test 3Average  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 be left in the beaker if the temperature was 30°C. Any number between 8.3ml and 10ml. Volume of water in beaker after 1 hour (cm 3 ) Temperature of oven (°C) Test 1Test 2Test 3Average 