Lesson: 8
Date:
Grade:
The topic of the
lessons
Learning
Objectives
Lesson Objectives: By the end of the lesson, the learner will be able to:
Melting and freezing
✓ Learn about melting/freezing point;
Teacher’s name:
Number present
Number absent
point
✓ ALL learners will be able to tell examples of of melting and freezing
✓ MOST learners will be able to recall definitions of melting and freezing
✓ SOME learners will be able to explain boiling point.
Subject Learning:
✓ Learners can sketch and explain the meaning of melting and freezing point
Language Learning:
✓ Learners can interpret sketch graphs to explain melting and freezing point
(speaking and listening skills OR reading and writing skills)
SubjectSpecific Vocabulary and Terminology:
molecules, energy, melting, freezing, melting point, freezing point, boiling
point, solid, liquid, gas.
(молекулалар, энергия, балқу, мұздату, балқутемпературасы,
қатутемпературасы, қайнаунүктесі, қатты, сұйық, газ)
The melting point of ice and the freezing point of water are at exactly the same
temperature.
The melting point is when solid is changing to liquid. (ice to water)
The freezing point is when liquid is changing to solid. (water to ice)
Chemistry
Projector or Smart board for power point presentation
Language
Objectives:
Useful Sets of
Phrases for
Dialogue and
Writing:
Cross curricular
links link
ICT skills
Previous Learning: Heat transfer. Application of heat transfer.
Planned
timings
07min
815 min
Lesson’s plan
Planned Activities
I. Organization moment:
Greeting.
II. Introduction new topic:
Look at the new topic and try to say lesson’s objective .
(Student’s answer)
Learn about melting/freezing point
Freezing/MeltingPoint
Whatisfreezingpoint?
It is the temperature at which a liquid becomes a solid
The melting point of ice and the freezing point of water are at exactly
the same temperature.
The melting point is when solid is changing to liquid. (ice to water)
Resources
presentatio
n
sides:
12
34 The freezing point is when liquid is changing to solid. (water to ice)
Freezing/Melting Point
Whatismeltingpoint?
It is the temperature at which a solid becomes a liquid
Do you know melting and freezing points of some substances?
Do you have any questions?
III. Review:
Test with explanations
Which of the following is the temperature at which ice melts?
A. 0o Kelvin
B. 0o Fahrenheit
C. 0o Celsius
D. 0o Gram
Which of the following is the temperature at which ice melts?
C.0o Celsius
Correct The Celsius scale uses 0o as the melting point.
0 Kelvin Incorrect
A. Kelvin is the measurement unit that includes absolute zero. The
temperature would have to be 274 K for ice to melt
B. 0o Fahrenheit Incorrect
Fahrenheit is the measurement unit that is traditional in the U. S. The
1535 min
temperature would have to be 32o F for ice to melt.
D. 0 Gram Incorrect
Gram (g) is the measurement unit used to represent mass – not
temperature.
If you are camping at sea level and want to boil water so it will be
safe to drink, what temperature will it need to reach?
A. 15 KВ. 100o CС. 100o F D. 150 g
If you are camping at sea level and want to boil water so it will be
safe to drink, what temperature will it need to reach?
5
618
B. 100o C Correct
The Celsius scale uses 100o as the boiling point for water.
A. 15 K Incorrect
Kelvin is the measurement unit that includes absolute zero. The
temperature would have to be 373o K for water to boil.
C.
100o F Incorrect
Fahrenheit is the measurement unit that is traditional in the U. S. The
temperature would have to be 212o F for water to boil.
D.
150 g Incorrect
A gram is the measurement unit for mass – not temperature.
Four students were working together in a lab group. They had to
predict the temperature at which water would boil. They recorded
their predictions in the table below.
Student
Prediction o C
1
2
75
90 3
100
125
4
Which student’s prediction was the closest to the boiling point of
water?
A. Student 1В. Student 2С. Student 3Д. Student 4
C.
Student 3 Correct
100o C is the boiling point of water.
A. Student 1 Incorrect
B. Student 2 Incorrect
D. Student 4 Incorrect
None of these are the boiling point of water on the Celsius scale.
Students were doing a lab to find the melting point of ice. Which
thermometer would show the temperature in o Celsius at which ice
would begin to melt?
1
2
3
4
A. Thermometer 1 C. Thermometer 3
B. Thermometer 2
D. Thermometer 4
C correct because ice melts above 0o C and the question asks at
what temperature ice would begin to melt.
Three students were discussing what they understood about boiling,
freezing and melting point of water.
Sarah thought that the boiling, freezing, and melting point depended on
how much water was in the container.
Bill thought that the boiling, freezing, and melting point of water were
all the same 100°C.
Carol thought that the freezing and melting point of water were both
the same but the boiling point of water was 100°C.
Who do you agree with and why?
Carol is correct. The freezing and melting point of water are
both the same and 0°, but the boiling point of water was 100°C.
Sarah and Bill are incorrect.
Sarah Because boiling, freezing, and melting points are physical
properties, they do not change just because there is more or less water.
Bill the boiling point is 100°C, but freezing and melting are much
lower at 0°.
A student drew this illustration in their journal. Discuss all of the
information about the boiling point, freezing and melting point of
water that is shown in this drawing. • Boiling point is 100°
• Freezing and melting point is 0°
• Freezing and melting point is the same.
• Water goes from melting/freezing to liquid and then solid when heat
• Water goes from gas to liquid and then solid when heat is removed
is added.
(cooling happens)
• Boiling point changes liquid water to a gas
• Melting point changes solid water to a liquid
• Freezing point changes liquid water to a solid
3540 min
IV. Home task: learn definitions.
Reflection:
Name one thing you would like to know more
Give one thing which you find difficult
Name one thing you liked most
The topic of the lessons Review.
The topic of the lessons Review.
The topic of the lessons Review.
The topic of the lessons Review.
The topic of the lessons Review.
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