SCIENCE JUNIOR HIGH SCHOOL QUIZ BEE REVIEWER

a science reviewer for JHS

1. Science Reviewer

2. EASY ROUND

3. 1. What is the smallest unit of life? A. O rganelle B. T issue C. Atom D. C ell

4. D. Cell

5. 2. What term describes the change of state from liquid to solid? A. Evaporation B. Condensation C. Freezing D. Melting

6. C. freezing

7. 3. What is the study of the movement and transformation of energy called? A) Thermodynamics B) Kinetics C) Dynamics D) Thermology

8. A. Thermodynamics.

9. 4. Which element is the lightest metal? A. Lithium B. Aluminum C. Cobalt D. Nickel

10. A. Lithium

11. 5. Which metal element is recognized as the best conductor of electricity? A. C opper B. Aluminum C. I ron D. S ilver

12. D. Silver

13. 6.How many valves are there in the human heart? 8 6 4 2

14. c. 4 AORTIC VALVE – BETWEEN LEFT VENTRICLES AND AORTA PULMONARY VALVE- BETWEEN RIGHT VENTRICLE AND PULMONARY VALVE TRICUSPID VALVE- RIGHT ATRIUM AND VENTRICLE BICUSPID/ MITRAL VALVE- LEFT ATRIUM AND VENTRICLE

15. 7.Where are the red blood cell are made up? Blood vessels Heart lungs Bone marrow

16. d. Bone marrow

17. 8. Where in the body that the smallest bone found? Brain Lung Ear Eye

18. c. Ear

19. 9. What percent in the blood is plasma? 45% 55% 1% 35%

20. b. 55% PLATELETS AND WBC = 1% RED BLOOD CELL=44% PLASMA= 55%

21. 10. What is the largest artery of the heart? Super Vena Cava Aorta Septum Interior vena cava

22. b. Aorta SUPERIOR AND INTERIOR VENA CAVA = VEINS SEPTUM= WALL SEPARATING THE HEART CHAMBERS.

23. 11. Which teeth are used to bite into food? Canines Molar Incisors Pre molars

24. C. Incisors INCISORS= FRONT TEETH CANINE= POINTED TEETH FOR TEARING PRE MOLARS AND MOLARS= GRINDING AND CUTTING

25. 12. Which eye muscle elevates the eyes? Superior rectus Inferior rectus Retina Iris

26. a. Superior rectus Retina and Iris parts of the eye Retina=convert light to electrical signal to brain can process and create vision. Cornea= cover the iris and pupil, providing clear vision Pupil= focused on the retina to form an image. Iris= color of the eye. Regulates the amount of light enters the eye. Inferior = rotation and depression of eye

27. 13. How may types of muscle/s is /are there in human body? 1 (skeletal) 2 ( cardiac, skeletal) 3(cardiac, skeletal, smooth) 4(cardiac, smooth, skeletal, nerves)

28. c. 3(cardiac, skeletal, smooth Cardiac- heart Skeletal – bone for movement Smooth –involuntary muscles inside in some organs moving waste to your intestine, breathing,

29. 14. Which blood vessel carries blood away from the heart? Artery Vein Capillary Ventricle

30. Artery

31. 15.What is the lifespan of the red blood cell? 120 days 150 days 130 days 140 days

32. a. 120 days

33. 16. What percentage of the Earth’s atmosphere does O 2 comprise? 75% 21% 50% 32%

34. b. 21% 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases . 

35. 17. The tanning rays of the sun are called_____. Infrared rays Gamma rays Visible lights ray Ultraviolet rays

36. d. Ultraviolet rays

37. 18. Global climate change is being attributed to the atmospheric increase in what two gases produced by human activities? Oxygen & hydrogen Nitrous oxide & sulfur dioxide Methane & carbon Ozone & methane

38. c. Methane & carbon

39. 19. Which of the following is a metamorphic rocks? Granite Sandstone Quarts Marble

40. d. Marble Granite- igneous Sandstone- sedimentary Quartz- mineral Igneous- form from magma or lava Sedimentary- mineral or organic compound (pre existing rocks) Metamorphic- existing rocks subjected to high heat and pressure hot minerals.

41. 20. The scientist who formulated a heliocentric model of the solar system? Descartes Ptolemy Copernicus Galilei

42. c. Copernicus

43. AVERAGE ROUND

44. 1. What is the second most abundant mineral in the human body?

45. Phosphorus

46. 2. What is the correct name for N 2 3 ?

47. dinitrogen trioxide

48. 3. The loss of water through the stomata of leaves is called ____.

49. transpiration

50. 4. the study of celestial objects in the visible band and visible light._____________

51. Optical astronomy

52. 5. is a space telescope that was launched into low Earth orbit in 1990. _____________________

53. Hubble Space Telescope

54. 6. the outer visible layer of the sun.

55. Photosphere

56. 7. It is made of the layers of gases surrounding a planet or other celestial body.

57. Atmosphere

58. 8. A process in which heat is transferred by movement of fluid is ______.

59. Convection

60. 9.is the study of stars including their creation, evolution & death.

61. Astronomy

62. 10. What is the largest hot desert in the Earth?

63. Sahara desert

64. 11. What is the point in the Earth’s orbit nearest to the sun?

65. Perihelion

66. 12. Orbital period of moon around the sun?

67. 27.3 days

68. 13. Who is the father of geology?

69. James Hutton

70. 14. Controls what goes in and out of the cell?

71. Cell membrane / Plasma membrane

72. 15. German astronomer, mathematician, astrologer, natural philosopher, music writer known for his 3 laws of planetary motion.

73. Johannes Kepler

74. DIFFICULT ROUND

75. 1. What is the displacement of a car moving with a uniform velocity of 20 meters per second for 40 seconds?

76. 800 m

77. 2. A 1.2 L sample of gas is determined to contain 0.07 mole of nitrogen. At the same Temperature and pressure. What amount of mole would there be in a 20 L sample?

78. N 2 =1.17 mole

79. 3. A gas is initially in a 3 L piston with a pressure of 2 atm. What is the new volume if the pressure changes to 2.5 atm by moving the piston down?

80. V 2 =2.4 L

81. 4. What is the momentum , a 5.0 kg mass moving at 10.0 m/s

82. P= 50 kg. m/s

83. 5. What is the mole s of NaCl in 5 grams of Na Cl ?

84. Number of Moles: 0.0855 mol.

85. Number of moles = Mass / Molar mass