Question 7:
Diagram 6.1 shows the penetration power of three types of radioactive radiations.
Diagram 6.1
(a) Name substances, X and Z.
X : ………………………… [1 mark]
Z : …………………………. [1 mark]
(b) Diagram 6.2 shows a radioactive substance emitting radioactive radiations that pass through an electric field.
Diagram 6.2
Draw the movement of beta radiation in Diagram 6.2. [1 mark]
(c) Suggest one method to handle radioactive substance safely.
Explain your answer. [3 marks]
Answer:
(a)
X: Sheet of paper
Z: Thick lead block
(b)
(c)
Work in areas behind protective shields such as concrete wall or lead shield. Radioactive radiations are blocked by those protective shields and it won’t harm our body.
Diagram 6.1 shows the penetration power of three types of radioactive radiations.
Diagram 6.1 (a) Name substances, X and Z.
X : ………………………… [1 mark]
Z : …………………………. [1 mark]
(b) Diagram 6.2 shows a radioactive substance emitting radioactive radiations that pass through an electric field.
Diagram 6.2Draw the movement of beta radiation in Diagram 6.2. [1 mark]
(c) Suggest one method to handle radioactive substance safely.
Explain your answer. [3 marks]
Answer:
(a)
X: Sheet of paper
Z: Thick lead block
(b)
Work in areas behind protective shields such as concrete wall or lead shield. Radioactive radiations are blocked by those protective shields and it won’t harm our body.