What is everything

Natural sciences

Grade 8

Matter: classification

Module 13

What is everything made of?

Prior Knowledge from Grade 7:

Learners have learnt that all living and non-living things, are defined as matter.

Learners have learnt that matter occurs in three phases.

Learners have learnt that matter occupies space and that it has both volume and mass.

Class activity: group discussion

1. Can you move with equal ease through all kinds of substances?

2. Is there any substance (matter) through which it is impossible to move?

3. Answer the following (yes/no) and give an example if no:

a) Can light move through all matter?

b) Can warmth move through all matter?

c) Can sound move through all matter?

d) Can electricity move through all matter?

e) Does matter always retain its form?

1. Classify matter observed around you according to the phases that you know by completing the following:

GAS:

LIQUID:

SOLID:

Memorandum

What is everything made of?

CLASS ACTIVITY: GROUP DISCUSSION

1. no

2. yes

3. a) no – walls, roofs

b) no – asbestos, wood

c) no – sound-proof material

d) no – insulators, e.g. plastic, rubber

e) no – heating and forces transform, e.g. by melting

4. gas: air; liquid: water; solid substance, table