Boiling Point Lab
Hlinka/Benson
8th grade science
2015
Introduction/Thinking
Questions
•
What is boiling?
•
Is boiling always hot?
•
What happens to a liquid when it boils?
•
What is the boiling point of water (in Celsius)?
•
What do you think will happen to the temperature of
boiling water if you continue to heat it for 5 minutes?
I. Define the Problem:
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II. Focus Question:
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III. Prediction:
I think that the temperature will
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_. I think this
because____________________
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IV. Share:
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V. Plan of Action
A. Materials:
Bunsen Burner, Beaker, ice,
thermometer, salt, goggles, ring
stand, tongs
V. Plan of Action
B. Independent Variable:
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V. Plan of Action
C. Dependent Variable:
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V. Plan of Action
D. Control:
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V. Plan of Action
E. Procedure:
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V. Plan of Action/ E. Procedure
Continued:
2.
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V. Plan of Action/ E. Procedure
Continued:
3.
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V. Plan of Action/ E. Procedure
Continued:
4.
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V. Plan of Action/ E. Procedure
Continued:
5.
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V. Plan of Action/ E. Procedure
Continued:
6.
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VI. Data Chart
VI. Data Continued
B.Data Graph
Leave the next page
for the graph of
the data.
Temperature on Y
axis vs Time on X
axis.
VIII. New Vocabulary
• Boiling Point
• Phase Change
• Acclimation
IX. Claims and Evidence
Make at least 4 claims backed up by
evidence from the data and graphs.
Example: I claim that _______. I
claim this because ________.
X. Conclusion and Reflection
Either copy questions or create a complete sentence answer out
of the questions.
1. What type of change did the
water undergo when it changed
from a solid to a liquid to a gas?
X. Conclusion and Reflection
Either copy questions or create a complete sentence
answer out of the questions.
2. When water boils, bubbles form
at the bottom and rise to the top.
What exactly are the bubbles
comprised of and why do they
appear to form at the bottom of
the beaker?
X. Conclusion and Reflection
Either copy questions or create a complete sentence
answer out of the questions.
3. Why didn’t the temperature of
the ice water mixture increase
rapidly once it was placed on the
hot plate?
X. Conclusion and Reflection
Either copy questions or create a complete sentence answer out
of the questions.
4. After about 3-5 minutes of
heating the temperature began to
rise very quickly, why did this
occur?
X. Conclusion and Reflection
Either copy questions or create a complete sentence answer out
of the questions.
5. Why didn’t the temperature
continue to rise once it reached
the boiling point?
X. Conclusion and Reflection
Either copy questions or create a complete sentence answer out
of the questions.
6. How can water boil below 100o C?
X. Conclusion and Reflection
Either copy questions or create a complete sentence answer out
of the questions.
7. Based on your results how does
adding salt affect the freezing
and boiling points of of water?
X. Conclusion and Reflection
Either copy questions or create a complete sentence answer out
of the questions.
8. Calcium Chloride (salt) is used in the
winter to melt ice on roads and
sidewalks. When salt is added to ice it
makes the temperature of the ice
colder. How can ice melt if the
temperature actually becomes colder?
X. Conclusion and Reflection
Either copy questions or create a complete sentence answer out
of the questions.
9. At the boiling point the heat of
vaporization occurs. Based on
your observations, what do you
think the heat of vaporization is?
X. Conclusion and Reflection
Either copy questions or create a complete sentence answer out of the questions.
10. Element z has a boiling point of 72o C
at standard atmospheric conditions.
Yesterday, a lab group measured the
boiling point of z to be 65o C. Why did
this occur and what happened physically
to to z when it reached this
temperature?
X. Conclusion and Reflection
Either copy questions or create a complete sentence answer out
of the questions.
11. Describe what is happening to
the molecules of the water as it
changes from a solid to a liquid to
a gas.
X. Conclusion and Reflection
Either copy questions or create a complete sentence answer out
of the questions.
12. List two characteristics of
solids, liquids,and gases that apply
only to those phases.
X. Conclusion and Reflection
Either copy questions or create a complete sentence
answer out of the questions.
13. Draw how you think the
molecules look and how they must
be arranged when the water is a
solid, a liquid, and a gas. Make
sure you label each diagram.
X. Conclusion and Reflection
14. Discussion Summary: Write a
paragraph describing the main
ideas and concepts in this lab.
Include the overall purpose in
doing the lab. (Do not restate the
problem statement or the results)
XI. Hypothesis Reflection
My hypothesis was correct or
incorrect because……..
XII.Questions for further thinking
Make at least 3 “I wonder…” or “I am
still thinking about…” statements.