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biology chemistry Uncategorized

YEAR 9 BIOLOGY TOPICAL TEST ON PHOTOSYNTHESIS

1. What is photosynthesis [2]

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2. Name THREE things that must be there for photosynthesis to take place. [3]

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3. Write down an equation for photosynthesis.[3]

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C. glucose made in photosynthesis is converted to another substance. What is the name of the substance [1]

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   4. During a biology lesson, a student was asked to test a leaf for starch. He did the following. The procedure is not in order

1. Boiled the leaf in ethanol for 2 minutes

2. Added the leaf in the boiling water for 1 minute

3. Took a healthy leaf from a tree

4. Boiled some water in a beaker

5. added iodine to the leaf

6. Placed the leaf on a white tile

7. Passed cold water on to the leaf.

1. What is the right order of events was the learner supposed to follow. Complete below [7]

      —–                                                      …

2. What was the purpose of doing the following? [4]

1. Boiling the leaf in cold water for 1 minute

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2. Boil the leaf in ethanol

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3. Pass cold water on to the leaf.

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4. What was the colour change observed when Iodine was added to the leaf.

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3. What are fertilisers. [1]

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4. State the role of the following to plants [2]

1. Magnesium

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2. Nitrates.

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5. What are the effects to a plant lacking the following [2]

1. Nitrates

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2. Magnesium

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6. What is a flower?

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Name two parts that make the following in a flower [4]

1. Stamen

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2. Pistil

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7. State the role of the following parts of a flower [6]

1. Stigma

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2. Ovary

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3. Ovules

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4. Anthers

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5. Pollen grain

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6. Petals

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8. State 3 uses of water in plants. [3]

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9. A student was observing two flowers, Flower A had coloured petals while Flower B did not have coloured petals.

1. state the agent of pollination of the flowers [2]

1. Flower A……………………………………………

2. Flower B……………………………………………

2. apart from coloured petals state any other 3 differences between the two flowers. [6]

Flower A Flower B
1………………………………………… ………………………………………… ………………………………………… 2………………………………………… ………………………………………… ………………………………………… 3………………………………………… ………………………………………… ………………………………………… ………………………………………… ………………………………………… ………………………………………… ………………………………………… ………………………………………… ………………………………………… ………………………………………… ………………………………………… …………………………………………

10. What is pollination. [1]

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11. flowers produce a sweet smelling tasting substance to attract bees and butterflies. What is its name? [1]

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12. Draw a flower and label any two parts. [4]

Categories
biology chemistry Uncategorized

YEAR 9 BIOLOGY IGCSE CAMBRIDGE QUESTIONS

1. a. What is a habitat?

…………………………………………………………………………………………………………………..……………………………………………………………………………………[1]

b. State two adaptations of the following organisms to their habitat

Cactus

…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………[2]

2. Polar bear

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3. Sea-lion

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4. Camel

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5. Water Lily

…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………[2]

6. Spruce tree in arctic region

…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………[2]

2.  (i) Draw the following food chains that show all tropic levels and that consists of:-

1. Chicken as a tertiary consumer

…………………………………………………………………………………………………[2]

2. Man as a quaternary consumer

…………………………………………………………………………………………………[2]

3. Maize as a producer

…………………………………………………………………………………………………[2]

4. Dog as a secondary consumer

…………………………………………………………………………………………………[2]

5. Rabbit as a primary consumer

…………………………………………………………………………………………………[2]

6. Earthworms a decomposer

…………………………………………………………………………………………………[2]

(ii) Connect the food chains above to produce a single food web. [12]

3. (i) State any 2 other decomposers. [2]

   (ii). State 3 importance of decomposers in our lives today [3]

(iii). Complete the passage below to show how the following organisms feed using the following words.

Digest, Energy, dead,cells,decaying,small, absorbed,soluble, repair,enzymes,hormones.

Decomposers feed on dead ………………. matter. They do this by releasing chemical substances called ……………………………. When these chemicals are released, they ………………. the large insoluble molecules of food to …………………..   ………………….. molecules that can be ………………………….by the decomposers. These food molecules are used in the body as a source of ………………………., for making new ……………….and……………… of damaged or worn out organelles.    [9]