Jc Aqa Gcse 230 P1a1 2 Pct Testing Surfaces

P1a 1.2 Practical sheet Name:

Class:

Testing different surfaces Aim To investigate how different surfaces affect radiation. This investigation is in two parts. •

In the first part, you are asked to compare the radiation given out by two different surfaces.

•

In the second part, you are asked to compare absorption of radiation by different surfaces.

Part 1 1

Compare how fast two identical beakers (or cans) of hot water cool. One of the beakers should be wrapped in shiny foil and the other in matt black paper. Each beaker should be on an insulating mat and should have a lid to stop the water evaporating.

2

Make sure each beaker contains the same volume of hot water and the starting temperature of the water in each beaker is the same.

3

Using a thermometer in each beaker and a stopwatch, measure the water temperature in each beaker at the start and then every minute for ten minutes. Stir the water between making measurements.

Record all your measurements in the results table. Plot your measurements on a graph of water temperature against time. Use your results to discuss which beaker lost energy fastest.

AQA Science © Nelson Thornes Ltd 2006

P1a 1.2

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P1a 1.2 Practical sheet Continued …

Part 2 4

Use the arrangement in Part 1 to compare how fast two identical beakers of cold water warm up. One of the beakers should be wrapped in shiny foil and the other in matt black paper. Each beaker should be on an insulating mat.

5

Make sure each beaker contains the same volume of cold water and the temperature of the water in each beaker at the start is the same.

6

Using a thermometer in each beaker and a stopwatch, measure the water temperature in each beaker at the start and then every minute for ten minutes.

Record all your measurements in the results table. Plot your measurements on a graph of water temperature against time. Use your results to discuss which beaker gained energy fastest.

Results table Part 1 measurements Time from start/ minutes

Temperature/°C

AQA Science © Nelson Thornes Ltd 2006

Part 2 measurements Time from start/ minutes

Temperature/°C

P1a 1.2

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