Page 10 - Syok Praktis PBD (2023) Science TH4

Science Year 4 Practice 2 Humans

Subjective Questions

1. Class 4A has conducted an investigation to determine the rate of breathing after carrying out
CS 2.1 activities J, K and L. After the activity, the result of the investigation for one of the students is
recorded in Table 1 below.
Table 1
Activity J K L

Chest movement per minute 28 times 21 times 35 times
Rate of breathing (Low / Medium / High)

(a) Complete the rate of breathing in Table 1.
(b) Among the following, which are possibly J, K and L? Match.

J K L

(c) Among the following, which is a possible reading for the number of chest movement per
minute at rest, that is, before any activity is carried out? Circle your answer.

18 times 30 times 45 times

2. Diagram 1 shows a situation.
CS 2.3 (a) Based on Diagram 1, state the response towards the stimuli.

(b) Which sensory organ is involved in the response?

Diagram 1
(c) What will happen if the boy did not move his hand away?

(d) Based on you answer in 2(c), state two importance of caring for your sensory organs.

Gamified
Quiz 1

13 © Penerbitan Pelangi Sdn. Bhd.

Practice 2.indd 13 27/09/2022 1:53 PM