Lesson Template

LESSON TEMPLATE Name of the teacher trainee : Standard : VIII Name of the school Strength : 51 Duration

Subject : 45 min Unit

Preethi. V : G.M.H.S.S, Varkala : Chemistry : Basic constituents of matter

Age

CURRICULAR STATEMENT To develop different dimensions of knowledge on topic ‘Compounds’ through experiments, observation, discussion and evaluation by questioning observation of practical works, reporting presentation etc and applied the knowledge in unfamiliar situation

CONTENT ANALYSIS

Term

:

Facts

:

and hence it is

Pure substances, elements, compounds. (1) (2)

H 2O is a compound. Methane (CH 4) contains atoms of two elements a compound.

(3) NH 3 is a compound having N and H Concepts : elements through

Compounds are substances formed from two or more

chemical combination and which cannot be separated by physical means.

LEARNING OUTCOME

To enable the pupil……………………………………

1)

to recall the definitions of compounds and identify the same for developing factual knowledge.

2) to explain the characteristics of compounds for developing conceptual knowledge. 3)

to exhibit the practical work for developing procedural

knowledge 4) knowledge.

validating the process to develop metacognitive

PRE – REQUISITES The students already know about pure substances and elements.

TEACHING – LEARNING RESOURCES

in laptop.

Materials

:

Ball and stick models

Audio-visual aids

:

Chart and images of compounds

Classroom Interaction Procedure

Expected pupil response

Introduction Do you know how many elements present in water we use every day?

Yes, two elements.

Can you say the elements present in water? Hydrogen, oxygen What are the elements present in our sodium chloride? Whether these substances have same element or different element? Can you say the name of these type of substances? Through this class, we are going to study about these type of substances. Presentation

Sodium, Chlorine.

Different element Don’t know

Teacher divided the students into 6 groups. They are given names A,B,C,D,E,F and ask them to do the following activities.

Students are arranged into groups.

Activity – I

Students joined according to the instructions given and shown by the teacher.

Teacher gave one red ball( labelled as oxygen) and two black balls (labelled as hydrogen) and ask them to join as shown by the teacher. Then students were asked to write answers to the questions given in their card and after discussion the structure is shown in the laptop. Discussion clues 1. What does red ball indicates? 2. What does black ball indicates? 3. Can you guess the substance? What is it? 4. Can we separate oxygen and hydrogen from water?

Oxygen Hydrogen Water No

Concept to be consolidated. When we join one oxygen and two hydrogen ,we get water. It contains more than two elements. But we cannot separate it.

Activity – II Teacher gave one blue ball ( labelled as nitrogen) and three black balls (labelled as hydrogen) and ask them to join as shown by the teacher. Then they were asked to write questions given in the activity card and after discussion structure is shown in the laptop. Discussion clues 1. What does the blue ball indicates? 2. What does the black ball indicates? 3. Can you guess the substance? What is it? 4. Can you separate the elements by physical means?

Students joined according to the instructions given by the teacher.

Nitrogen Hydrogen Ammonia No

Concept to be consolidated When one nitrogen and three hydrogen are joined, we get ammonia. It contains more than two elements. It cannot be separated by physical means.

Students follows the instructions given by the teacher. Activity - III Teacher gave one red ball( labelled as carbon) and four black balls( labelled as hydrogen) and ask the students to join as shown by the teacher. Then they were asked to write answers to the questions given in the activity card. Discussion 1. What doesclues. the red ball indicates? 2. What does the black ball indicates? 3. Can you guess the substance? 4. Can you separate the elements by

Carbon Hydrogen Methane No

Concept to be consolidated When one carbon and four hydrogen are joined, we get methane. It contains more than two elements. It cannot be separated by any physical means.

Generalisation When one oxygen and two hydrogens are joined, we get water. When one nitrogen and three hydrogens are joined, we get ammonia. When one carbon and four hydrogens are joined, we get methane. All these contains more than two elements. And these elements cannot be separated by any physical means.

FOLLOWUP ACTIVITIES 1. What are the elements present in water? 2. What are the elements present in ammonia? 3. What are the elements present in methane? 4. How many elements are present in each? 5. Can we separate the elements by physical means? 6. Can we called these as compounds? 7.

Define a compound

ENRICHMENT ACTIVITY

Collect more examples for compounds from your daily life

CHALK BOARD WORK Date: 7/8/2015 Std : VIII.A Day : Friday Str : 51 Activity

CHEMISTRY Elements present

1.

Water

H, O

2.

Ammonia

N, H

3.

Methane

C, H

No of elements

Two Two Two

COMPOUNDS

separate /cannot seperate Cannot seperate “ “