Page 149 - Biology Form Two

Biology for Secondary Schools

Procedure
1. Set up the apparatus as shown in Figure 6.12.

Delivery tube
Cork
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Soda lime
Bell jar
Thistle funnel To filter pump

Lime water
Lime water

Conical flask Mouse Conical flask

Figure 6.12: Experimental set-up to demonstrate respiration in animals

2. Apply petroleum jelly on all the openings to prevent air from entering the
apparatus.

3. Note the colour of lime water in each flask.
4. Switch on the filter pump so that a stream of air is drawn through the set-up.

5. Prepare a short report about your observation.

Question
What can you conclude from your observation?

Activity 6.7: Demonstrate respiration in plants

Materials
Potted plant, polythene paper, black cloth, bell jar, conical flasks, cork, lime
water, soda lime, thistle funnel, delivery tubes, filter pump, and petroleum jelly

Procedure
1. Set up the apparatus, as shown in Figure 6.13.

Student’s Book - Form Two 143

05/10/2024 15:36:46
BIOLOGY FORM 2 NEW.indd 143 05/10/2024 15:36:46
BIOLOGY FORM 2 NEW.indd 143