
To identify what patterns
of heating and cooling
cause local winds.
Do sand and water heat at
the same rate?
 Do sand and water cool at
the same rate?


Write a hypothesis using the
IF, THEN, BECAUSE format.
IF equal amounts of sand and water are
heated, THEN the sand will heat up faster,
BECAUSE solids heat up faster than liquids.
IF equal amounts of sand and water are
cooled, THEN the water will cool off slower,
BECAUSE liquids retain heat better than
solids.

Manipulated:

Responding:

Controlled:
What are you changing?
What changes in response to what you
changed?
What 2 variables need to stay the same for a
fair test?
1 beaker
 2 cups
 2 thermometers
 Lamp
 Stopwatch
 150 mL sand
 150 mL water

1.
2.
3.
4.
5.
Gather materials.
Using the beaker, carefully measure out
and fill one cup with 150 mL of sand.
Using the same beaker, carefully
measure out and fill the other cup with
150mL of room temperature water.
Place a thermometer into each cup
(be sure the thermometer is at the
bottom of the cup).
Wait two minutes, measure and record
the starting temperature (oC) of each
substance in your data table.
6.
7.
8.
9.
10.
11.
Place the beakers side by side an equal
distance from the lamp.
Turn on the lamp.
Measure and record temperature data
(oC) every minute for 10 minutes in your
data table.
Turn off lamp.
Measure and record temperature data
(oC) every minute for 10 minutes in your
data table.
Clean up.


Make a double line graph depicting
the data from the two beakers.
(remember to include a title and
labels for each axis.)
Write your conclusion following the
format on the “How to write an 8th
grade lab write-up” handout.