LAB #9 – Heating Earth’s Surface
Hypothesis
Materials – 2
thermometers, 2 beakers, soil, water, lamp with 150 Watt bulb, stopwatch
Procedure –
1.
Fill one beaker
with water and one with soil.
2.
Put a thermometer
in each of the beakers.
Results
Temperature With Light On ('C)
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Temperature With Light Off (‘C)
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Time (min.)
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Soil
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Water
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Time (min.)
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Soil
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Water
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0
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0
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1
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1
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2
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2
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3
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3
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4
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4
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5
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5
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6
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6
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7
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7
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8
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8
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9
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9
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10
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10
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Analysis
1.
(Draw two graphs;
graph 1 compares data from Temperature with Light On and graph 2 compares data
from Temperature With Light Off.)
2.
Calculate the
total change in temperature (‘C) for each material. Compare/Contrast the changes in temperature
for soil vs. water.
3.
What does the “soil”
represent on Earth? What does the
“water” represent on Earth?
4.
How does what you
have learned in this lab relate to weather and the formation of wind? (Hint: think High and Low pressure)
Conclusion
(Write a summary of your experiment (One full page!).
Was your hypothesis right? What did you learn?
What could you do next time? Was it fun? How is this
related to what we are learning in class?)
(Write a summary of your experiment (One full page!).
Was your hypothesis right? What did you learn?
What could you do next time? Was it fun? How is this
related to what we are learning in class?)
Lab #13 – Heating Up and Cooling Down
Do you remember how long it took for
a cup of hot chocolate to cool before you could take a sip? The hotter the
chocolate, the longer it seemed to take to cool.
Problem
How
does the temperature of a liquid affect how quickly it warms or cools?
Hypothesis
Materials
3 beakers
3 thermometers
Stopwatch
Ice
Hot plate
Procedure
- Use the data table to record the temperature of water in three beakers
every minute from 0 to 15 min.
- Fill one beaker with 100 mL of water. Place the beaker on a hot
plate and bring the water to a boil. Carefully remove the hot beaker from
the hot plate.
- Record the water temperature in your data table at minute 0, and
then every minute for 10 min.
- Repeat step 3 starting with water at room temperature and ice
water.
Results
Ice Water
Time (min.)
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Temperature ('F)
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Temperature ('C)
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0
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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Room Temperature water
Time (min.)
|
Temperature ('F)
|
Temperature ('C)
|
0
|
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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Boiling Water
Time (min.)
|
Temperature ('F)
|
Temperature ('C)
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0
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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Analysis
1.
Graph your data for all four
beakers; use only your temperatures in Fahrenheit! Use a different color for each beaker.
2.
Calculate the rate of heating or
cooling for the water in each beaker by subtracting the initial temperature of
the water from the final temperature and then dividing by 10 min.
3.
a. What is the independent
variable?
b. What is the dependent
variable?
c. What are your constants?
.a What happened to the temperature of
the boiling water?
b. What happened to the
temperature of the ice water?
c. Do you
think there will be a temperature at which they would eventually meet? If so, where do you think it will be? If not, why not?
Conclusion
