S1 ExamI. Multiple Choices

1. Which of the following procedures requires us to put on a pair of safety goggles in the laboratory?

A Preparing a sugar solution.B Heating a liquid in a test-tube.C Transferring a salt solution from a reagent bottle to a beaker.D Measuring the rate of heartbeat.

2. Which of the following equipment can be found in the laboratory to put out a fire?(1) Fire blanket(2) Fire extinguisher(3) Sand bucket(4) Fire hoseA (1) and (3) onlyB (2) and (4) onlyC (1), (2) and (3) onlyD (2), (3) and (4) only

3. When something gets into the eye of a student during an experiment, he/she should

A use a bandage to cover his/her eye.B wash his/her eye with the eye-wash bottle.C put on a pair of safety goggles to protect his/her eye.D wash his/her eye with disinfectant.

4. What is the use of the following piece of apparatus?

A To hold a test-tube.B To hold a dropper.C To hold a flask.D To hold a measuring cylinder.

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5. To transfer 1.5 mL of a liquid, which of the following piece of apparatus would be the most suitable?

6. The first step to use a Bunsen burner is toA open the air hole.B close the air hole.C light a match.D turn on the gas tap.

7. Which of the following statements about an endangered species is correct?A It is dangerous to humans.B It is nearly extinct.C It is unable to reproduce.D It does not have enough food to eat.

8. Which of the following activities can destroy natural habitats?(1) Building reservoirs(2) Building houses(3) Cutting trees for timber(4) Setting up wildlife reservesA (1) and (2) onlyB (2) and (4) only

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AD

C

B

C (1), (2) and (3) onlyD (2), (3) and (4) only

9. Which of the following endangered species can be found in the countryside of Hong Kong?

(1) Black-faced spoonbill(2) Crocodile(3) Giant Panda(4) Romer’s tree frog

A (1) and (3) onlyB (1) and (4) onlyC (2) and (3) onlyD (1), (2) and (3)

10. Which of the following is the function of structure X in the plant cell below?

A Control activities of the cell.B Carry out photosynthesis.C Store water.D Protect the cell.

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II. True or False Questions

1. We may do experiments according to the procedures designed by ourselves without getting our teacher’s permission.

2. We should put on a pair of safety goggles when we enter a laboratory only if we have short sight.

3. Hazard warning labels on the reagent bottles are used to show the names of the chemicals contained in the bottles.

4. We should open the air hole of the Bunsen burner before using it. 5. When using the Bunsen burner, the laboratory should have good ventilation.6. An animal which has scales is a reptile. 7. The backbone of vertebrates is used for supporting the body. 8. An animal that has no hair but has milk glands is a mammal. 9. Blood group, eye colour and intelligence vary among different people. Therefore,

we can be divided into clear-cut groups based on these differences. 10. The presence of ear lobe can separate a class of students to two clear-cut groups.

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III. Short Questions

1. Write down the meaning of each of the following hazard waning labels.

(a) (b) (c)

(a) (b) (c)

2. What is happening as shown in the following Bunsen burner? What is the cause of this?

3. Name 4 safety precautions we should take to avoid accidents when doing experiments.

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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4. Match the following statements with the five steps involved in a scientific investigation:(a) Perhaps air spaces of the soil are filled by rainwater so that the earthworms cannot breathe and they come out.(b) The earthworms always come out from the soil after rainfall.(c) Take some soil with the earthworms as the sample. Add water to the soil sample until it is full of water. (d) Why do the earthworms come out from the soil after rainfall but not on a sunny day?(e) If there is rainfall, the soil will be flooded with water. This causes the earthworms to come out from the soil.(a) _____________________________________________________________(b) _____________________________________________________________(c) _____________________________________________________________(d) _____________________________________________________________(e) _____________________________________________________________

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Long Questions

1. We use science apparatus to do experiments. Refer to the photos below and answer the questions that follow.

(1) (2) (3)

(4) (5)

(a) What are the above five pieces of apparatus? What is the use of each of these pieces of apparatus? Complete the following table.

Name(s) of the piece(s) of apparatus Use(s) of the piece(s) of apparatus(1)

(2)

(3)

(4)

(5)

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(b) Some laboratory apparatus can be represented by simple line drawings. Prepare simple line drawings for apparatus (2), (4) and (5) in the spaces provided below.

(2) (4) (5)

(c) Use some pieces of apparatus shown above, use simple line drawings to show how you heat up a beaker of water in the space provided below. Label all apparatus in your diagram.

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2. The following two photographs show a man and a chimpanzee.

Man Chimpanzee(a) Both of them belong to the same group of animals. Name this group of

animals. _____________________________________________________________

(b) With reference to the photographs, explain why these two animals belong to the same group. _____________________________________________________________

(c) Name 2 characteristics of this group of animals. _____________________________________________________________

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