Grade 09 Coordinated Science H.W. 28/12/12

Grade 09 Coordinated Science H.W. 28/12/12

Type of homework : Knowledge based (Need notebook)  and online revision

Duration : 1 hour

Date of submission : 02/01/2013


1 Select the most appropriate words from the list below to complete the…following


A green plant can make all the substances it needs. It builds up carbohydrates by the process of …….. In this process, it combines …….. from the …….. with ……. from the ……. to form …….  The …… needed for this process comes from ……., which is absorbed by the  ……. in the .……. of leaf cells. The waste product of the process is………

soil, energy, oxygen, glucose, chloroplasts, mineral salts, cells, photosynthesis, air,  

  respiration, sunlight, water, nitrogen, chlorophyll, carbon dioxide.

 2  Write  the word equation which summarises the process of photosynthesis

3 What gases will be taken in and given out by a green plant (a) in darkness, (b) in bright


4 Is it possible for a plant to be photosynthesize and respiring at the same time?

5 (a) What carbohydrates does a plant make from glucose?

(b) Which of these carbohydrates is transported round the plant?

(c) Which carbohydrate is the main storage substance?

6 (a) What additional substances does a plant need to make amino acids and proteins from glucose?

(b) Where do these substances come from?

7 What ions must a plant obtain from the soil in order to make  chlorophyll?

8 Name an artificial fertiliser or fertilisers which farmers can use to increase the supply of

nitrate, phosphate and potassium to their crops.

 9 (a) How would you destarch the leaves of a potted plant?

(b) How would you check that the destarching had been effective?

l0 In a school laboratory, what is usually regarded as evidence that photosynthesis has

occurred in a plant?

11 In designing an experiment to find out whether light is needed for photosynthesis

(a) what is the principle of the design

(b) what control would you use?

12 A leaf is detached from a tree and tested with iodine. The leaf turns dark blue.

(a) What does this result tell you?

(b) Why is this result not sufficient evidence to confirm that photosynthesis had taken place in the leaf?

Link for revision: (This link is to practice labeling of the leaf structure) (Quiz)

Write the requirements, procedure and conclusion of the experiment of photosynthesis and stomata done in lab. Draw diagram in both the cases.

Enjoy your vacation.

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