Match the items in List A with the correct description in List B by writing the letter of the correct description in the space provided in List A. List A (i) Substances which are dangerous and may cause death. (ii) Substances which can catch fire easily. (iii) Substances which emit harmful radiation. (iv) Substances which can damage the skin and other tissues. (v) Substances containing microbes which can cause disease. List B A Explosive B Toxic C Toxic D Irritant E Fragile F Flammable G Bio hazard H Radioactive

1. Substances which are dangerous and may cause death. (1 mk)
2. Substances which can catch fire easily. (1 mk)
3. Substances which emit harmful radiation. (1 mk)
4. Substances which can damage the skin and other tissues. (1 mk)
5. Substances containing microbes which can cause disease. (1 mk)

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The Saranga Football Team's goalkeeper collapsed during the match due to muscle cramps. Which component in the First Aid kit will you use to give him first aid?

(b) State two ways you would recommend to the patients so as to control the disorder.

1. ................................................................................................................................................................................................................................ (2 mk)
2. ................................................................................................................................................................................................................................ (2 mk)
3. Substances which emit harmful radiation. (1 mk)
4. Substances which can damage the skin and other tissues. (1 mk)
5. Substances containing microbes which can cause disease. (1 mk)

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(a) Identify the organs which are used for gaseous exchange in the following organisms: (i) Cow (ii) Frog (iii) Maize leaf (iv) Fish (b) Plants cannot survive without carrying out the process of gaseous exchange. In three points, justify this statement.

1. Identify the organ used for gaseous exchange in a Cow. (2 mk)
2. Identify the organs used for gaseous exchange in a Frog. (2 mk)
3. Identify the organ used for gaseous exchange in a Maize leaf. (2 mk)
4. Identify the organs which are used for gaseous exchange in Fish. (1 mk)
5. Identify the organ used for gaseous exchange in a Fish. (2 mk)
6. Justify in three points why plants cannot survive without carrying out the process of gaseous exchange. (2 mk)
7. Plants cannot survive without carrying out the process of gaseous exchange. Justify this statement in three points. (4 mk)

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Draw the following apparatuses which are found in the Biology laboratory and state the use of each. (a) Spatula (b) Tripod stand (c) Test tube holder (d) Filter funnel

1. Draw a Spatula and state its use. (2 mk)
2. Draw the Spatula and state its use. (0 mk)
3. Draw a Tripod stand and state its use. (2 mk)
4. Draw the Tripod stand and state its use. (0 mk)
5. Draw a Test tube holder and state its use. (2 mk)
6. Draw the Test tube holder and state its use. (0 mk)
7. Draw the Filter funnel and state its use. (0 mk)
8. Draw a Filter funnel and state its use. (2 mk)

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Two couples visited the hospital complaining of general body weakness. The doctor diagnosed them with sickle cell anaemia. Outline six symptoms of such disorder.

1. Outline six symptoms of sickle cell anaemia. (6 mk)
2. Outline six symptoms of such disorder. (0 mk)

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Draw a diagram of a plant cell as seen under the light microscope and label six parts.

1. Define photosynthesis. (2 mk)
2. List the raw materials for photosynthesis. (2 mk)
3. Name the pigment that absorbs sunlight. (1 mk)
4. ................................................................................................................................................................................................................................ (2 mk)

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The school Baraza, selected you to become the chairperson for cholera prevention campaign in the neighbouring community. Briefly explain five ways you will use to educate the community about the prevention of the disease.

1. Explain one way you will use to educate the community about the prevention of cholera. (1 mk)
2. Explain the theory of natural selection. (5 mk)
3. Provide two examples of adaptations in plants that help them survive in desert environments. (4 mk)
4. Explain one way you will use to educate the community about the prevention of cholera. (1 mk)
5. Explain one way you will use to educate the community about the prevention of cholera. (1 mk)
6. Discuss how adaptations contribute to the survival and diversification of species. (6 mk)
7. Explain one way you will use to educate the community about the prevention of cholera. (1 mk)
8. Explain one way you will use to educate the community about the prevention of cholera. (1 mk)

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Self-employed women have come to Dar es Salaam for training in food preservation methods. Elaborate to them the six methods of food preservation.

1. Drying (2 mk)
2. Canning (2 mk)
3. Refrigeration (2 mk)
4. Freezing (2 mk)
5. Salting/Curing (2 mk)
6. Smoking (2 mk)

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