Page 16 - Genius PBD Science Year 4

Date: Science Year 4 Unit 2 Humans

LS 2.1.2 Describe the breathing process in terms of air passage and exchange of gases in the lungs through observation by using various media.
LS 2.1.3 Differentiate the content of oxygen and carbon dioxide during inhalation and exhalation.
LS 2.1.4 Describe the chest movement during inhalation and exhalation by carrying out activities.

2. (a) Draw the air passage in the diagram below during: LS 2.1.2 PL 2
(i) Inhalation using the arrow ( ).
(ii) Exhalation using the arrow ( ).

(b) Then, complete the air passage for the two processes below.

Inhalation Exhalation

3. Fill in the blanks with the correct answers. LS 2.1.3 LS 2.1.4 PL 3 PL 4 HOTS Analysing

Inhalation Exhalation

(a) During inhalation, our chest (a) During exhalation, our chest
moves and moves and
expands. At the same time, air contracts. At the same time, air
the lungs. the lungs.

(b) The inhaled air has (b) The exhaled air has
oxygen and carbon dioxide
carbon dioxide. and oxygen.

PERFORMANCE LEVEL ( ) 1 2 3 4 5 6

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02 Unit 02 Genius PBD SCIENCE YR4.indd 9 19/10/2022 4:57 PM