Name_____________________________†††††††††††††††††††††††††††††††††††††††† Date: _____________

 

 

Activity:Differential Heating and Cooling

 

Objectives:

 

          To observe that soil both heats up and cools faster than water.

          To observe that different colors absorb different amounts of the Sunís radiation.

          To research, compare and contrast temperature patterns around the country/world.

 

Materials:

 

Reflector lamp with 100 watt bulb

2 x 250 ml beakers

150 ml of soil

150 ml of water

2 thermometers

Stopwatch

Temperature map

 

Procedure:

1. Place 150 ml of soil in one beaker and 150 ml of water in the other beaker.

Place a thermometer in each beaker and record the starting temperature.

 

2. Place the lamp 10 cm from the beakers. Make sure that both beakers are equally distant from the lamp and that both receive an equal amount of light.

 

3. Turn on the lamp and record the temperature every minute for 10 minutes.

 

Heating

 

Time

Temperature (oC)

Minute 1

 

Minute 2

 

Minute 3

 

Minute 4

 

Minute 5

 

Minute 6

 

Minute 7

 

Minute 8

 

Minute 9

 

Minute 10

 

 

 

4. Turn off the lamp and record the temperature every minute for 10 minutes.

Cooling

 

Time

Temperature (oC)

Minute 1

 

Minute 2

 

Minute 3

 

Minute 4

 

Minute 5

 

Minute 6

 

Minute 7

 

Minute 8

 

Minute 9

 

Minute 10

 

 

 

5. Graph your results.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6. Write up your results and explain what you observed.