Science Theory-1B

小学IMSO科学竞赛试题

23. There are two rooms separated by a door as shown in Figure below. The pressure in the

room A is 1 atmosphere and in the room B is 0.9 atmosphere. What happens when the door is opened?

AB

(Point 2)

Answer:

24. Look at following figure. What is the volume of water in container B after the valve of container A is opened for a certain time as shown in figure?

(point 1)

Answer:

25. What is the benefit of using an antiseptic liquid or alcohol that has a low surface tension?

(point 3)

Answer:

theory 1 9

小学IMSO科学竞赛试题

26. Why can a mosquito rest down on water surface? (point 2) Answer: 27. Draw forces that work on the circus actor hanging on a rope below: (Point 2) Answer (you may use the figure to draw your answer): 28. Please fill in the blank with minimum 3 items respectively: Renewable energy Un-renewable energy (point 3) theory 1 10

小学IMSO科学竞赛试题

29. Make a list of activities (at least 3 activities) to conserve energy (environment):

30. Could you explain 3 negative impacts to our environment in most of crowded or dense

populated cities?

(point 1.5)

Answer:

31. As Neils Armstrong reached the Moon, his weight is reduced. Why does it happen. (point 2) Answer:

32. A space shuttle is revolving the earth with a constant speed of 18000 km/hours in the height

of 10000 km above the earth surface. The radius of the earth is approximately 6400 km. How many hours does the space shuttle need to revolve the earth one time?

(point 2)

Answer:

33. Look at the following circuit diagram, and fill the table below what happen when a certain

switch is ON or OFF. (point 1.5) Answer:

theory 1 11

小学IMSO科学竞赛试题

(point 3) (Write down ON or OFF) Switch S is connected to A B C

34. A car is travellling from city A at 08:20 pm to city B with a distance of 500 km. If the speed

of the car is 80 km/hour, what time will car arrive at city B. (point 2) Answer:

35. Why shuttle cock always moves with the head in front. (point 2) Answer:

theory 1

12

小学IMSO科学竞赛试题

36. Dead Sea in Middle East contains concentrated salt. Your body will float on the sea surface even you have no ability to swim. On the other hand, on the common sea, your body will sink if you could not swim. Explain why?

(point 2)

Answer:

37. At the northern and southern countries we will find four seasons: spring, summer, fall, and winter. We find snow during winter, even during this period we still experience a full sunny day. Why does temperature become so cold?

(point 2)

Answer:

38. When you are sleeping on a foam mattress, you feel good, while when sleeping on a hard plate, you feel pain. Explain why?

(Point 2)

Answer:

theory 1 13