Science Chapter 9-11 Revision

1. Which of the following metals does NOT react with dilute hydrochloric acid?

• Aluminum

• Zinc

• Iron

• Cropper

2. Which of the following acids is NOT strongly corrosive?

• Nitric acid

• Carbonic acid

• Hydrochloric acid

• Sulphuric acid

3. Which of the following are examples of neutralization?

(1) Adding dilute sodium hydroxide solution to dilute hydrochloric acid

(2) Add sugar to lemon tea

(3) Adding calcium hydroxide to acidic soil

(4) Adding calcium carbonate to dilute sulphuric acid

• (1) and (2) only

• (1) and (3) only

• (1), (3), and (4) only

• (1), (2), (3), (4)

4. Which of the following is the function of cochlea?

• Producing the sense of hearing

• Converting sounds into vibrations

• Producing messages after being stimulated by the vibrations from the ear bones

• Transmitting messages to the brain

7. People with healthy eyes can read the words clearly by holding the book 30 cm away from their eyes. However, Tom can only do so by holding the book 15 cm away from his eyes.

(a) What is Tom’s eye defect?

7(b) State TWO causes of this eye defect.

7.(c) Suggust what Tom should do if he wants to read the words clearly by holding the book 30 I'm away from his eyes.

• Wear glasses with concave lens

• Wear glasses with convex lens

7.(c) Draw a light ray diagram referring to Question 7(b).

One day, Tom found that his optic nerves are damaged and lose his functions.

8. (a) When Tom is looking of an object, will the image of an object fall on the retina of Tom’s eyes? Explain your answer clearly.

(b) will Tom lose his sight? Explain your answer clearly.

9. What is the function of ear bones, Pinna, and ear channels?