MEDIUM
Lower Secondary Stage 8
IMPORTANT
Earn 100

Yuri makes a model of the lungs as shown below.

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State what is represented by:

The bell jar

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Important Questions on Respiration and Circulation

MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Workbook>Chapter 2 - Respiration and Circulation>Exercise 2>Q 10

Yuri makes a model of the lungs as shown below.

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State what is represented by:

The balloon

MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Workbook>Chapter 2 - Respiration and Circulation>Exercise 2>Q 10

Yuri makes a model of the lungs as shown below.

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When Yuri pulls down on the rubber sheet, the balloon gets bigger. Explain why.

MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Workbook>Chapter 2 - Respiration and Circulation>Exercise 2>Q 10

Yuri makes a model of the lungs as shown below.

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Predict what would happen if he pushed the rubber sheet upwards. Explain your prediction.

MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Workbook>Chapter 2 - Respiration and Circulation>Exercise 3>Q 1
How does the nose help keep the lungs clean?
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Workbook>Chapter 2 - Respiration and Circulation>Exercise 3>Q 2

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The diagram shows a type of specialised cell found in the trachea.

Name the tall cells shown in the diagram.

MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Workbook>Chapter 2 - Respiration and Circulation>Exercise 3>Q 2

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Describe the function of these cells.

MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Workbook>Chapter 2 - Respiration and Circulation>Exercise 3>Q 2

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Describe the effect of cigarette smoke on these cells.

MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Workbook>Chapter 2 - Respiration and Circulation>Exercise 3>Q 3
Name a substance found in cigarette smoke that is addictive.