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Science contest

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mid level science

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Science contest

  1. 1. Gr. 7 & 8 Science Quiz contest
  2. 2. 1. Which organelle is known as “the cell’s brain”? a. Ribosome b. Nucleus c. Mitochondrion d. Funny Bone
  3. 3. 2. Which of the following is not part of a bacterial cell? a. Nucleus b. Protein c. Ribosome d. Cytoplasm
  4. 4. 3 . What is apoptosis? a. A type of death that resembles suicide b. The popping sound cells make when they die c. Type of cell division that produces daughter cells d. The type of cell death that occurs as the result of traumatic injury or exposure to toxic chemicals
  5. 5. 4 : The largest human cell (by volume) is the egg. a. True b. False
  6. 6. 5. The nucleus of an atom consists of: a. Electrons b. Neutrons c. protons and neutrons d. protons, neutrons, and electrons
  7. 7. 6. An electron carries a _______. positive charge
  8. 8. 7. Entomology is the scientific study of: a. Internal organs b. Birds c. Insects d. Trees e. Lichens
  9. 9. 8. The green pigment found in plants that performs photosynthesis is: a. Melanin b. Chloroplast c. Chlorophyll d. Chromatophore
  10. 10. 9. A proton has what electrical charge? a. no charge b. positive charge c. negative charge d. either a positive or negative charge
  11. 11. 10. The ozone layer protects us from too much: a. carbon dioxide b. gamma radiation c. ultraviolet radiation d. temperature fluctuation
  12. 12. 11. Lizards belong to which animal group? a. Amphibians b. Reptiles c. Invertebrates d. mammals
  13. 13. 12. What is the 7th element on the periodic table of elements?  N
  14. 14. 13. True or false? DNA is the shortened form of the term ‘Deoxyribonucleic acid’?
  15. 15. 14. Pure water has a pH level of a around?
  16. 16. 15. What is the name of the part of the human skeleton which protects our brain?
  17. 17. 16. Is the compound ‘HCl’ an acid or base?
  18. 18. 17. These functions are all part of a mechanism that allows the body to maintain a balance between itself and the environment. What is that mechanism called? a. Homeostasis b. Metabolism c. Osmosis d. diffusion
  19. 19. 18. What is formed immediately after fertilization occurs? a. Sperm b. Egg c. Embryo d. zygote
  20. 20. 19. Which is a chemical change? a. melting an ice cube b. dissolving sugar in boiling water c. boiling an egg d. crushing a can
  21. 21. 20) What is formed immediately after fertilization occurs? a. sperm b. egg c. embryo d. zygote
  22. 22.  21. Mushrooms that grow on the sides of trees in a forest ecosystem are best classified by which of the following types of organisms? a.Consumers b.Decomposers c. Predators d.Producers
  23. 23. 22. Fruit is derived from which part of the flower?
  24. 24. 23.. Pollination involves the transfer of pollen from a. 5 to 1 b. 5 to 4 c. 5 to 3 d. 4 to 5 e. 4 to 1
  25. 25. 25. The parts of the male reproductive structure of the flower are ____ and ____
  26. 26. 26. The petal of a flower is represented by
  27. 27. 27. Organisms that comprise the greatest mass of living substance (biomass) in a terrestrial food chain a. Decomposers (e.g., bacteria) b. Producers (e.g., grasses) c. Primary consumers (e.g., mice) d. Secondary consumers (e.g., snakes) e. Tertiary consumers (e.g., hawks)
  28. 28.  28. Nitrogenous base that occurs in RNA but not in DNA a. Deoxyribose b. Ribose c. Uracil d. Cytosine e. Thymine
  29. 29. 29. What happens when two negatively charged particles are next to each other? a. The particles attract each other. b. One particle becomes uncharged. c. One particle becomes positively charged. d. The particles repel each other
  30. 30. 30. The two types of prokaryotes are __________ and ____________
  31. 31. 31. Which gas is monatomic at STP? a. chlorine b. fluorine c. neon d. nitrogen
  32. 32.  32. There are alternate acid base theories that define an acid as any species that can a. donate a proton b. donate an electron c. accept a proton d. accept an electron
  33. 33.  33. An ion with 5 protons, 6 neutrons, and a charge of 3+ has an atomic number of a. 5 b. 6 c. 8 d. 11
  34. 34.  34. When a solid changes to a liquid it is called what?  Melting
  35. 35.  35. When a gas changes into a liquid it is called ________
  36. 36.  36. What is it called when a solid changes directly into a gas?
  37. 37.  37. What is the name given to substances that are initially involved in a chemical reaction?
  38. 38. 38. Atoms of the same chemical element that have different atomic mass are known as?
  39. 39.  39. Another name for your voice box is the?
  40. 40.  40. The wind pipe in the reproductive system is the _________
  41. 41.  41. The external layer of the skin of the body is called ___________
  42. 42.  42. What is the human body’s biggest organ?
  43. 43.  43. Who was the first person to walk on the moon?  Neil Armstrong
  44. 44.  44. At room temperature, what is the only metal that is in liquid form?
  45. 45.  45. Sound travels faster through water than air.  True
  46. 46.  46. What is the freezing temperature of water?
  47. 47.  47. What is the largest ‘big cat’ in the world?  Tiger
  48. 48. 48. What is the tallest animal in the world?  Giraffe up to 6m
  49. 49.  49. Which famous scientist is the father of inheritance?
  50. 50.  50. A person who studies about physics is called ______________
  51. 51.  51. A person who studies about plants is called _________________
  52. 52.  52. The SI unit of force is _____
  53. 53.  53. The unit of acceleration is ____
  54. 54.  54. Weight and mass are the same.
  55. 55.  55. There are ______ liters of blood in adult human being.
  56. 56.  56. The study of heredity is called _________________
  57. 57.  57. The two types of prokaryotes are __________ and ____________
  58. 58.  58. Anything that has mass and occupies space is called _______________.
  59. 59.  59. The average adult human skeleton has _______ bones. 206
  60. 60.  60. The common pathway for the digestive system and respiratory system
  61. 61.  61. The smallest, basic, structural and functional unit of living things is called a. cell b. tissue c. virus d. bacteria
  62. 62.  62. The process that produces sex cells is called a. mitosis b. meiosis c. cell cycle d. pedigree
  63. 63.  63. How many different types of amino acids are there in nature?  A) 15 B) 30 C) 60 D) 20
  64. 64.  64. All of the following are not found in animal cells except a. Cell wall b. chloroplast c. large vacuole d. cell membrane
  65. 65.  65. The only liquid none metal is ___________
  66. 66.  66. The most abundant element in the human body is ____  o
  67. 67.  67. The most abundant element in the universe is ____  h
  68. 68.  68. The most abundant element in the earth’s crust is ____  o
  69. 69.  69. The largest part of the human brain is the ____
  70. 70.  70. The second most abundant element on earth is ____  Si
  71. 71.  71. The opposite of evaporation is __________. a. condensation b. convection c. radiation d. conduction
  72. 72.  72. __________ is the thermal energy that flows from a material with a higher temperature to one with a lower temperature. a. Kinetic energy b. Work c. Heat d. Potential energy
  73. 73.  73. Which is not a pure substance? a. helium b. copper wire c. air d. sucrose
  74. 74.  74. The atomic number is the a. same as the mass number of an atom. b. number of protons in a nucleus. c. number of protons and neutrons in the nucleus. d. number of neutrons in a nucleus.
  75. 75.  75. A natural phenomenon that becomes harmful due to pollution is _____________.  a. global warming b. ecological balance c. greenhouse effect d. desertification
  76. 76.  76. The pollutant responsible for ozone holes is ____________. a. CO2 b. SO2 c. CO d. CFC
  77. 77.  77. One of the best solutions to get rid of non-biodegradable wastes is ______________ a. burning b. dumping c. burying d. recycling
  78. 78.  78. Which of the following is only a physical change? [7f-67] a. magnesium burns brightly when heated in air b. marble chips fizz with acid c. heating green copper carbonate powder turns it black d. when zinc oxide is heated it turns yellow, on cooling it becomes white
  79. 79.  79. An athlete completes a 40 m race in 5 seconds. What is the average speed of the athlete? [9k-74] a. 9 m/s b. 8 m/s c. 200 m/s d. 35 m/s
  80. 80.  80. The resultant of balanced forces is ________ a. non zero b. equal to zero c. not equal to zero d. equal to the acceleration produced in the body
  81. 81.  81. The physical quantity, which is the measure of inertia, is ________ a. density b. weight c. force d. mass
  82. 82.  82. The S.I. unit of force is a. erg b. joule c. Newton d. dyne
  83. 83.  83. What is the force acting on an object of mass 10 kg moving with a uniform velocity of 10 m/s? a. 100 N b. 10 N c. 0 d. 1 N
  84. 84.  84. The resultant of action and reaction forces is _______. a. greater than zero b. less than zero c. zero d. none of the above
  85. 85.  85. Which substance cannot be decomposed into simpler substances? a. ammonia b. aluminum c. methane d. methanol

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