游戏桌面的横切面

游戏桌面的横切面 St. Joseph's Anglo-Chinese School nd2 Term Examination F.2 Integrated Science Paper I Time allowed : 60 minutes Name:___________________________ Total : 7 pages Class No.:________________________ Instructions : 1. Answer all Questions. 2. The diagrams in this question paper are NOT necessarily drawn to scale. 1. The diagram below shows the percentage of different gases in air. Answer the questions by referring to the diagram. Gas Y Gas X (21%) (78%) Gas Z (0.03%) (a) Write down the name of gases X, Y and Z. :3 marks: Gas X Y Z Name (b) Give TWO testing methods to distinguish gases X, Y and Z. (6 marks) ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ (c) State ONE daily use of gas X. (2 marks) ______________________________________________________________________________ 2. The right diagram shows a simple liquid-fuel rocket. Page 1 of 7 (a) Draw ( ) and ( ) on the diagram to show the action produced by the rocket engine and the reaction of the rocket. (2 marks) (b) Describe briefly how the rocket is launching. (4 marks) _______________________________________________________ X _______________________________________________________ _______________________________________________________ Y _______________________________________________________ _______________________________________________________ (c) What types of fuel are stored inside fuel tank X and Y?:2 marks: _______________________________________________________ _______________________________________________________ (d) What will be produced after burning the fuel in X and Y? (2 marks) _________________________________________________ (e) Give TWO advantages of using X as rocket fuel. (2 marks) _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ (f) Some rockets transport the satellite to the space. Give ONE use of satellite. (2 marks) ______________________________________________________________________________ ______________________________________________________________________________ 3. The diagram below shows three different pH value of cleaning agents. Page 2 of 7 A B C pH 13 pH 2 pH 12 (a) A cleaner wants to use the above cleaning agents to wash the marble walls of the building. State and explain which one he should choose. (3 marks) ____________________________________________________________________________ __________________________________________________________________________ ____________________________________________________________________________ __________________________________________________________________________ (b) Concentrated cleaning agent is dangerous to human body. What is it? (2 marks) ____________________________________________________________________________ (c) The cleaner dilutes the cleaning agent before using. Write down the correct procedures to dilute the cleaning agent. (3 marks) _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ (d) State THREE precautions which must be carried out when diluting cleaning agent. (3 marks) _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ (e) If the cleaning agent is splashed onto the skin, suggest ONE treatment for the accident. (2 marks) _____________________________________________________________________________ Page 3 of 7 4. The diagram below shows when four different eyes are looking at the near and far objects, the light rays enter to the eyeball. A EYE B EYE EYE CD EYE V (a) Which eye(s) is(are) looking at the far objects? (2 marks) ________________________________________________________________________________ (b) Which eye(s) has/have eye defect? Write down the name of the eye defect. (4 marks) ________________________________________________________________________________ (c) Which type(s) of lens(es) should be used to correct the eye defect mentioned in (b). (2 marks) _______________________________________________________________________________________ _______________________________________________________________________________________ 5. The table below shows the air pollution index(API) of a particular region in one week and the number of cases of asthma caused. (a) What is the relationship between the API and the number of cases of asthma caused? (2 marks) ______________________________________________ 1 55 0 (b) Point out TWO air pollutants which will cause asthma. 2 100 3 (2 marks) 3 160 6 4 200 8 ______________________________________________ 5 240 12 6 220 10 ______________________________________________ 7 180 9 (c) State the source(s) of the air pollutants mentioned in (b). (2 marks) ______________________________________________ ______________________________________________ Page 4 of 7 6. The two diagrams below show a kind of game and the design of the table. The player hit on the disc and it moves smoothly on the table. cross section of the table 遊戲桌面的橫切面: 桌子的上方 air is blowing out from small hole the table disc (a) Explain how the design of the table can make the disc move quickly. (3 marks) ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ (b) Beside the method mentioned in (a), suggest TWO other methods that can make the disc move quickly. (4 marks) ________________________________________________________________________________ ________________________________________________________________________________ (c) Give TWO examples of friction in our daily life. (2 marks) _______________________________________________________________________________ _______________________________________________________________________ Page 5 of 7 7. Mr. Wong feels stomach ache, the doctor predicts that it is due to the excess acid production. (a) Which acid contains in gastric juice? (2 marks) _______________________________________________________________________________ (b) What is the effect to the stomach if excess acid is produced? (2 marks) _______________________________________________________________________________ _______________________________________________________________________________ (c) The doctor gives a kind of stomach medicine to Mr. Wong. He claims that it can neutralize the excess acid in the stomach. What is this medicine? How can it neutralize the excess acid? (3 marks) ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ (d) What will be produced when the medicine reacts with the acid in stomach? (2 marks) _______________________________________________________________________________ (e) His son said, 'after his father took the medicine, the pH value of his gastric juice will be changed to 7.' Do you agree? Give one reason to support your answer. (4 marks) ______________________________________________________________________________ ______________________________________________________________________________ _____________________________________________________________________________ (f) Give TWO kinds of indicators used to test acids in laboratory. State also the colour change of the indicators. (3 marks) _____________________________________________________________________________ _____________________________________________________________________________ ____________________________________________________________________________ Page 6 of 7 8. The diagram below shows the circuit connection of the television and lamp at home. The arrows show the direction of current flow. (a) Name this type of circuit connection. (2 marks) _______________________________________________ televilamp (b) State TWO advantages of using this type of circuit sion connection at home. (2 marks) ___________________________________________________ ___________________________________________________ (c) i A fuse was installed to protect the television. Draw the electrical symbol of the fuse. (2 marks) ii If the current passes through the television is 0.6 A, what is the fuse rating of the fuse? (2 marks) ____________________________________________________________________________ (d) If the fuse was broken, what will happen to the lamp? (2 marks) ____________________________________________________________________________ END OF PAPER Page 7 of 7