2.5 Molecules

Natural sciences

Grade 8

Matter: classification

Module 18

Molecules

Class activity

Building a Molecule

• Separate the balls into three groups according to colour.
• Each colour (pattern) represents a group of atoms.

  

• Now build models according to the following designs:

  

1. two atoms of hydrogen + one of oxygen

B. two atoms of oxygen + one of carbon

Answer the following questions by referring to the above:

1. Here ( A ) you have built a molecule known as

Here ( B) you have built a molecule known as

2. Explain what you think is represented by the rods.

3. Molecules are combinations of

4. What does hydroxide look like?

5. And ozone?

Assessment of model-building activity

Were you able to build the models?

[LO 2.2; LO 2.3]

Assignment

Sustainable Resources

• Find out what ozone is and why it is important for life on earth.
• Report what you find to the class as part of a campaign to promote awareness of endangered resources.
• Organise an exhibition in the classroom or in the school.

www.atm.ch.cam.ac.uk/tour

Assessment of campaign to promote awareness

Did you participate in the campaign to make other people aware of the ozone layer and all the issues surrounding it?

[LO 3.2]

Assessment

Learning outcomes 2: Constructing science knowledge

The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

We know this when the learner

2.2 is able to categorise information;

2.3 is able to interpret information.

Learning outcomes 3 : Science, society and the environment

The learner will be able to demonstrate an understanding of the interrelationships between science and technology, society and the environment.

We know this when the learner:

3.2 understands sustainable use of the earth’s resources.

Memorandum

1. Water and carbon dioxide

2. Bonds

3. O²

4. O³