Lab Section

• Question
• Does water or sand heat up and cool down faster?
• Hypothesis
• If water and sand or heated at the same temperature for the same amount of time, then….because………

Time
(min.)
0
0.5
3
3.5
4
4.5
1
1.5
2
2.5
5
SAND
Temp (°C)
Time
(min.)
0
0.5
3
3.5
4
4.5
1
1.5
2
2.5
5
Water
Temp (°C)

• Hot Plate
• 150 mL of sand in beaker
• 150 mL of water in beaker
• 2 Thermometers
• Goggles
• Stop Watch

1. Put on goggles and apron
2. Place one thermometer into the beaker of sand and one thermometer into the beaker of water.
3. Record the beginning temperature of the sand and water in each beaker in the data table on your handout.
4. Place the beaker of sand on one hotplate and the beaker of water on the other hotplate

4. AT THE SAME TIME turn both hotplates on 4
AND start the timer.
5. Read and record the temperatures of the sand and water in the data table on your handout every
30 seconds for a total of 5 minutes.
6. After 5 minutes turn both hotplates off and carefully move the beakers from the hotplate to the counter by grasping the top rim of the beaker.
DO NOT TOUCH THE BOTTOM OF THE BEAKER – IT
IS HOT!!

7. Reset and restart the timer.
8. After 5 minutes of cooling record the temperature of the sand and water in each beaker at the bottom of your data table.
9. Calculate and record the temperature change between the final heated temperature and the cooled temperature of the sand and water.

• Claim
– Answer the question
• Evidence
– The evidence is …….
– Give data (temperatures)
• Reasoning
– The reason is
– Explain how this causes Sea Breezes
– Use the term “Uneven Heating”