The 2007 RotaQuiz Club Level held in Los Baños, Laguna

17. SCIENCE Easy Question #1 (10 sec / 2 pts) 1. If you are at the top of Mount Everest, which is about 29,000 feet high, you are in what layer of the atmosphere? A. troposphere B. stratosphere C. mesosphere D. ozone layer

20. SCIENCE Easy Question #4 (10 sec / 2 pts) 4. If Earth revolved as it does now but rotated on an axis that wasn’t inclined, which of the following would occur: A. there would be no seasons B. there would only be two seasons C. half of the earth would always have night D. the year would be shorter

21. MATH Easy Question #5 (30 sec / 2 pts) 5. Suppose you buy 100 kilos of potatoes that are 99% water. After leaving them outside for a day, they are now 98% water. What is now the weight of these slightly dehydrated potatoes? A. 100 kilos B. 99 kilos C. 98 kilos D. 50 kilos

22. SCIENCE Easy Question #6 (10 sec / 2 pts) 6. This refers to the increasing concentration of a pollutant in organisms at higher trophic levels in a food web.

23. MATH Easy Question #7 (30 sec / 2 pts) 7. A car traveled 100 miles from A to B at 60 mph, and returns at 40 mph. What is the average speed for the round trip? A. 45 mph B. 48 mph C. 50 mph D. 100 mph

25. SCIENCE Easy Question #9 (10 sec / 2 pts) 9. The process by which the high temperature in the sun’s core causes hydrogen nuclei to fuse, forming helium nuclei, resulting into loss of mass which is then converted to light and heat energy.

26. MATH Easy Question #10 (30 sec / 2 pts) 10. At different time during the day, Ms. Segoradu will drop a letter to be typed into her secretary’s tray. Ms. Segoradu numbers these letters consecutively from 1 to 6 as she writes them. When there is time, her secretary takes the top letter out of the tray and types it. Which sequence below could not be the order in which the secretary typed the letters? A. 5,4,6,3,2,1 C. 4,2,5,6,3,1 B. 3,5,4,2,6,1 D. 2,4,6,5,3,1

28. SCIENCE Average Question #1 (10 sec / 3 pts) 1. Flavonoids are anti-oxidants found in fruits, dark chocolates, and other sources. These anti-oxidants protect our blood vessels from damaging effects of unstable oxygen compounds. What do you call these unstable oxygen compounds?

29. MATH Average Question #2 (45 sec / 3 pts) 2. There is a fertilizer that makes plants grow fast. When you apply this fertilizer, the plant will increase its height by one-half on the first day. On the second day its height increases by one-third of its height of the previous day. On the third day its height increases by one-fourth of its height of the previous day, and so on. How many days does it take to grow to 100 times its original height? A. 198 days C. 124 days B. 150 days D. 100 days

31. SCIENCE Average Question #4 (10 sec / 3 pts) 4. If you open the valve on the fuel gas tank, the fuel that escapes is in the gaseous state. This fuel is: A. octane B. propane C. nonane D. decane

32. MATH Average Question #5 (45 sec / 3 pts) 5. How many 4-letter “words” may be formed form the letters PEEPS? For example PEEP, PPEE, SPPE, etc. A. 12 B. 18 C. 24 D. 30

33. SCIENCE Average Question #6 (10 sec / 3 pts) 6. What is the element that is used to generate power in nuclear power plants?

34. MATH Average Question #7 (45 sec / 3 pts) 7. Suppose a clock is perfectly accurate, but has only an hour hand, no minute or second hand. What is the exact time when the hour hand is pointing at the 22 minute mark? A. 4:22 B. 4:23 C. 4:24 D. 4:25

36. SCIENCE Average Question #9 (10 sec / 3 pts) 9. What is the most recent scientific breakthrough that refers broadly to a field of applied science and technology whose unifying theme is the control of matter on the molecular level in scales smaller than 1 micrometer?

39. SCIENCE Difficult Question #1 (10 sec / 5 pts) 1. According to a newspaper, it’s unfair to compare Filipino politicians and crocodiles, while the former are cold-blooded, vicious monster, crocodiles are harmless, shy animals that are now classified as critically endangered by the World Conservation Union. The Philippines is home to one of the only 23 crocodilian species on Earth. What is the scientific name of this species of crocodile which is considered endemic to our country?

40. MATH Difficult Question #2 (60 sec / 5 pts) 2. If 2 a 2 b 2 c = 256, then the average of a, b and c is _____.

41. GENERAL INFORMATION Difficult Question #3 (10 sec / 5 pts) 3. This popular guy is informing us about the state of crisis our planet is in with the documentary film “The 11 th Hour” where he is the narrator, co-producer and co- writer. He also created a foundation to make people aware of environmental issues. Who is he?

42. SCIENCE Difficult Question #4 (10 sec / 5 pts) 4. European astronomers have discovered a “super Earth”, a world about 14 times the mass of our own around a star much like the sun. What is the name of this star which is just like our own sun in size and brightness, and is visible under dark skies from the southern hemisphere?

43. MATH Difficult Question #5 (60 sec / 5 pts) 5. The digits of the numbers from 20 to 59 inclusive are typed in one long line below that the digits of the numbers from 21 to 60 are typed: 202122232425…………….. 59 212223242526……..………60 The number of times that a digit on the top line has the same digit directly below it is ______.

44. SCIENCE Difficult Question #6 (10 sec / 5 pts) 6. One of the most recent medical discoveries is saving the blood from the newborn babies’ umbilical cord. This umbilical cord blood could be a rich source of cells that are in their early development and could thus be converted into any kind of cell, or cultured and grown into various body tissues and organs, like teeth, hair, nose, ear, leg bone, liver or stomach. What do you call these cells?

45. MATH Difficult Question #7 (60 sec / 5 pts) 7. Two different numbers are chosen at random from the set {0, 1, 2, 3, 4}. What is the probability that their sum is greater than their product?

46. GENERAL INFORMATION Difficult Question #8 (10 sec / 5 pts) 8. The Katipunan had also a woman chapter. Who was the first president of the women’s faction of this movement?

47. SCIENCE Difficult Question #9 (10 sec / 5 pts) 9. PCBs are groups of at least 50 organic compounds, used for many years as insulation in electrical equipment. This is capable of biomagnification. Recently, it was found out that PCBs disrupt reproduction among birds and possibly higher organisms in the food chain. What does PCB mean?

48. MATH Difficult Question #10 (60 sec / 5 pts) 10. How many four-digit whole numbers occur such that the left-most digit is odd, the second digit is even, and all four digits are different?

50. SCIENCE Tie-Breaker Question #1 (10 sec / 5 pts) 1. What is the universal law that bans the use of chlorofluorocarbons?

51. MATH Tie-Breaker Question #2 (60 sec / 5 pts) 2. A cube is increased to form a new cube so that the surface area of the new cube is 9 times that of the original cube. By what factor is the volume of the cube increased?

52. GENERAL INFORMATION Tie-Breaker Question #3 (10 sec / 5 pts) 3. How many cogs are there in the Rotary wheel?

53. MATH Tie-Breaker Question #4 (60 sec / 5 pts) 4. Exactly one ordered pair of positive integers (x, y) satisfies the equation 17 x + 13 y = 103 . What is the sum of x + y ?

54. GENERAL INFORMATION Tie-Breaker Question #5 (10 sec / 5 pts) 5. The fourth in the four-way test states: “Will it be _____________ to all concerned?”