Figure 4
You need the following containers:
metal mug, glass bottle and plastic cup
a. Fill each container with water.
b. Observe what happens to the water in the container.
Group discussion
c. Which of these objects do not allow water to pass through?
Fill Table 4 to show your observations.
Table 4
Object Material of which it is made Water passes through
Mug
Bottle
Cup Plastic No
Glass bottle Plastic cupMetal mug
We can see through glass. Glass is a material that allows light to pass through.
Therefore glass is transparent.
The wall is made of a material that does not allow light to pass through.
The material is not transparent. It is opaque.
Opaque and transparent are other two properties of materials.
We have to use the right material to make an object.
Does water pass through all materials?
We use mugs, bottles and cups to hold water. Let us nd out why.
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