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Question 20N.3.hl.TZ0.12c

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.3.hl.TZ0.12c
Level hl Paper 3 Time zone TZ0
Command term Outline Question number c Adapted from N/A
c.
[Maximum mark: 1]
20N.3.hl.TZ0.12c

1.57 % of the mass of a rock weighing 46.5 kg is uranium(IV) oxide, UO2. 99.28 % of the uranium atoms in the rock are uranium-238, U238.

(c)

Outline a health risk produced by exposure to radioactive decay.

[1]

Markscheme

Any one:

«genetic» mutations ✔

«could cause» cancer ✔
Accept specific named types of cancer.

cells «in body» altered ✔

cells «in body» cannot function ✔

damaged DNA/proteins/enzymes/organs/tissue ✔

«radiation» burns ✔

hair loss ✔

damage in foetuses ✔

damages/weakens immune system ✔

 

Examiners report

This question on outlining a health risk produced by exposure to radioactive decay posed no difficulty and the most common, correct answers included "could cause cancer" and "can damage DNA".

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