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SCHEME OF WORK
Chemistry
Form 4 2025
TERM III
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WK LSN TOPIC SUB-TOPIC OBJECTIVES T/L ACTIVITIES T/L AIDS REFERENCE REMARKS
1

REPORTING

2 1
METALS
Ores of some metals.
By the end of the lesson, the learner should be able to:


Name the chief ores of some metals.


Exposition and brief discussion.
K.L.B. BK IV
Pages 168-9
2 2
METALS
Ores of some metals.
By the end of the lesson, the learner should be able to:


Name the chief ores of some metals.


Exposition and brief discussion.
K.L.B. BK IV
Pages 168-9
2 3
METALS
Occurrence and extraction of sodium.
By the end of the lesson, the learner should be able to:
Describe occurrence and extraction of sodium.
Oral questions on electrolysis and equations at electrodes.
Brief discussion on occurrence and extraction.
Chart: Down?s cell.
K.L.B. BK IV
Pages 170-171
2 4-5
METALS
Occurrence and extraction of aluminium.
By the end of the lesson, the learner should be able to:
Describe occurrence and extraction of aluminium.
Brief discussion.
Write relevant chemical equations.
student book
K.L.B. BK IV
Pages 171-3
3 1
METALS
Occurrence and extraction of iron.
By the end of the lesson, the learner should be able to:
Describe occurrence and extraction of iron.
Brief discussion.
Write relevant chemical equations.
Chart: Blast furnace.
K.L.B. BK IV
Pages 173-5
3 2
METALS
Occurrence and extraction of iron.
By the end of the lesson, the learner should be able to:
Describe occurrence and extraction of iron.
Brief discussion.
Write relevant chemical equations.
Chart: Blast furnace.
K.L.B. BK IV
Pages 173-5
3 3
METALS
Occurrence and extraction of zinc.
By the end of the lesson, the learner should be able to:
Describe occurrence and extraction of zinc by electrolysis and reduction methods.
Brief discussion.
Write relevant chemical equations.
Flow chart: extraction of Zinc.
K.L.B. BK IV
Pages 175-9
3 4-5
METALS
Occurrence and extraction of zinc.
Extraction of lead.
By the end of the lesson, the learner should be able to:
Describe occurrence and extraction of zinc by electrolysis and reduction methods.

Explain how lead is extracted.
Brief discussion.
Write relevant chemical equations.
Q/A & brief discussion.
Write balanced chemical equations leading to extraction of lead.
Flow chart: extraction of Zinc.
Flow chart: extraction of lead.
K.L.B. BK IV
Pages 175-9
K.L.B. BK IV
Pages 179-80
4 1
METALS
Occurrence and extraction of copper.
By the end of the lesson, the learner should be able to:
Describe extraction of copper.
Q/A & brief discussion.
Write balanced chemical equations leading to extraction of copper.
Flow chart: extraction of copper.
K.L.B. BK IV
Pages 181-183
4 2
METALS
Occurrence and extraction of copper.
By the end of the lesson, the learner should be able to:
Describe extraction of copper.
Q/A & brief discussion.
Write balanced chemical equations leading to extraction of copper.
Flow chart: extraction of copper.
K.L.B. BK IV
Pages 181-183
4 3
METALS
Occurrence and extraction of copper.
By the end of the lesson, the learner should be able to:
Describe extraction of copper.
Q/A & brief discussion.
Write balanced chemical equations leading to extraction of copper.
Flow chart: extraction of copper.
K.L.B. BK IV
Pages 181-183
4 4-5
METALS
Physical properties of some metals.
Reaction of metals with oxygen.
By the end of the lesson, the learner should be able to:
State general properties of metals.
Explain the difference in physical properties of metals.
Explain effect of burning metals in air.
Compare physical properties of some metals as summarized in a chart.
Q/A & discussion based on physical properties.

Teacher demonstration / Group experiments.
Burning some metals in air.
Write relevant equations.
Brief discussion.
student book
Common lab. metals.
K.L.B. BK IV
Pages 183-4
K.L.B. BK IV
Pages 184-6
5 1
METALS
Reaction of metals with cold water and steam.
By the end of the lesson, the learner should be able to:
Describe reaction of metals with cold water and steam.

Arrange the metals in order of reactivity with cold water and steam.
Class experiments:
Investigate reaction of some metals with cold water and steam.
Analyse the results.
Metals: Al, Zn, Fe, Cu.
K.L.B. BK IV
Pages 186-9
5 2
METALS
Reaction of metals with cold water and steam.
By the end of the lesson, the learner should be able to:
Describe reaction of metals with cold water and steam.

Arrange the metals in order of reactivity with cold water and steam.
Class experiments:
Investigate reaction of some metals with cold water and steam.
Analyse the results.
Metals: Al, Zn, Fe, Cu.
K.L.B. BK IV
Pages 186-9
5 3
METALS
Reaction of metals with cold water and steam.
By the end of the lesson, the learner should be able to:
Describe reaction of metals with cold water and steam.

Arrange the metals in order of reactivity with cold water and steam.
Class experiments:
Investigate reaction of some metals with cold water and steam.
Analyse the results.
Metals: Al, Zn, Fe, Cu.
K.L.B. BK IV
Pages 186-9
5 4-5
METALS
Reaction of metals with cold water and steam.
Reaction of metals with chlorine.
By the end of the lesson, the learner should be able to:
Describe reaction of metals with cold water and steam.

Arrange the metals in order of reactivity with cold water and steam.


Describe the reaction of metals with chlorine.
Class experiments:
Investigate reaction of some metals with cold water and steam.
Analyse the results.
Teacher demonstration in a fume cupboard / in the open.
Investigate reaction of metals with chorine
Write corresponding equations.
Metals: Al, Zn, Fe, Cu.
Metals: Al, Zn, Fe, Cu.
K.L.B. BK IV
Pages 186-9
K.L.B. BK IV
Pages 189-191
6 1
METALS
Reaction of metals with acids.
By the end of the lesson, the learner should be able to:
Describe and explain reaction of metals with acids.
Group experiments: investigate reaction of metals with dilute acids.
Teacher demonstration: investigate reaction of metals with concentrated acids.
Discuss the observations made and write relevant chemical equations.
Metals: Al, Zn, Fe, Cu.

Acids; HCl, HNO3, H2SO4.
K.L.B. BK IV
Pages 191-4
6 2
METALS
Reaction of metals with acids.
By the end of the lesson, the learner should be able to:
Describe and explain reaction of metals with acids.
Group experiments: investigate reaction of metals with dilute acids.
Teacher demonstration: investigate reaction of metals with concentrated acids.
Discuss the observations made and write relevant chemical equations.
Metals: Al, Zn, Fe, Cu.

Acids; HCl, HNO3, H2SO4.
K.L.B. BK IV
Pages 191-4
6 3
METALS
Reaction of metals with acids.
By the end of the lesson, the learner should be able to:
Describe and explain reaction of metals with acids.
Group experiments: investigate reaction of metals with dilute acids.
Teacher demonstration: investigate reaction of metals with concentrated acids.
Discuss the observations made and write relevant chemical equations.
Metals: Al, Zn, Fe, Cu.

Acids; HCl, HNO3, H2SO4.
K.L.B. BK IV
Pages 191-4
6 4-5
METALS
Reaction of metals with acids.
Uses of metals.
By the end of the lesson, the learner should be able to:
Describe and explain reaction of metals with acids.
State uses of some metals and alloys.
Group experiments: investigate reaction of metals with dilute acids.
Teacher demonstration: investigate reaction of metals with concentrated acids.
Discuss the observations made and write relevant chemical equations.

Q/A & brief discussion;
Uses of Sodium, Aluminium, Zinc, Iron and Copper & some alloys.
Metals: Al, Zn, Fe, Cu.

Acids; HCl, HNO3, H2SO4.
student book
K.L.B. BK IV
Pages 191-4
K.L.B. BK IV
Pages 194-7
7 1
METALS
Environmental effects of extraction of metals.
By the end of the lesson, the learner should be able to:
Identify some environmental effects of extraction of metals.
Oral questions and open discussion.

Assignment / Topic review.
student book
K.L.B. BK IV
Pages 197-8
7 2
METALS
Environmental effects of extraction of metals.
By the end of the lesson, the learner should be able to:
Identify some environmental effects of extraction of metals.
Oral questions and open discussion.

Assignment / Topic review.
student book
K.L.B. BK IV
Pages 197-8
7 3
METALS
Environmental effects of extraction of metals.
By the end of the lesson, the learner should be able to:
Identify some environmental effects of extraction of metals.
Oral questions and open discussion.

Assignment / Topic review.
student book
K.L.B. BK IV
Pages 197-8
7 4-5
RADIOACTIVITY
Definition of radioactivity.
Alpha particles.
By the end of the lesson, the learner should be able to:


Define radioactivity, a nuclide and radioactive decay.
Differentiate between natural and artificial radioactivity.


State properties of alpha particles.
Describe methods of detecting alpha particles.


Q/A: Review the atomic structure.
Exposition: symbolic representation of an atom / nucleus.
Exposition: meaning of radioactivity and radioactive decay.
Discussion: artificial and natural radioactivity.


Q/A: position of helium in the periodic table.

Expository approach:

student book
K.L.B. BK IV
Pages 249-251
K.L.B. BK IV
Pages 251-253
8 1
RADIOACTIVITY
Equations involving alpha particles.
By the end of the lesson, the learner should be able to:
Write down and balance equations involving alpha particles.
Q/A: Review atomic and mass numbers.
Examples of balanced equations.
Supervised practice.
student book
K.L.B. BK IV
Page 257
8 2
RADIOACTIVITY
Equations involving alpha particles.
By the end of the lesson, the learner should be able to:
Write down and balance equations involving alpha particles.
Q/A: Review atomic and mass numbers.
Examples of balanced equations.
Supervised practice.
student book
K.L.B. BK IV
Page 257
8 3
RADIOACTIVITY
Beta particles. Gamma rays.
Radioactive Half-Life.
By the end of the lesson, the learner should be able to:
State properties of beta particles.
Define isotopes and isobars.
Write down balanced equations involving both alpha and beta particles.
State properties of gamma rays.
Define the term radioactive half-life. Solve problems relating to half ?life
Q/A: Review isotopes.
Expository approach: teacher briefly exposes new concepts.
Examples of equations.
Supervised practice.
Assignment.
Teacher demonstration: Dice experiment.
Exposition of the term half-life.
Worked examples.
Written exercise
student book
Dice.
K.L.B. BK IV
Pages 251-253
8 4-5
RADIOACTIVITY
Radioactive decay curve.
Nuclear fusion and nuclear fission. Applications of radioactivity.
By the end of the lesson, the learner should be able to:
Plot a radioactive decay curve to deduce the
half ?life from the curve.
Differentiate between nuclear fusion and nuclear fission.
Describe applications of radioactivity.
Drawing a radioactive decay curve inferring the half-life of the sample from the graph.

Exposition of new concepts accompanied by nuclear equations.
Brief discussion: Carbon dating, detecting leakage, medication, agriculture, industry; effect of static charges, etc.
Graph papers.
student book
K.L.B. BK IV
Pages 254-5
K.L.B. BK IV
Pages 259-260
9-12

REVISION AND KNEC EXAMINATION

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