Battle of the Brain 2023-2024.pptx

quiz bee

1. Battle of the Brains Sept 15, 2023

2. 1) A part of a cell where large storage for food, water, and waste is present a. Vacuole c. Organ b. Tissue d. Cellulose

3. a. Vacuole

4. 2) The temperature at which the solid melts to become liquid is known as? a. Melting point c. Boiling point b. Freezing point d. solidification point

5. a. Melting point

6. 3) It is the changing of a gas to liquid as heat is removed and the particles lose energy is called? a. Deposition c. Vaporization b. Condensation d. Sublimation

7. d. Sublimation

8. 4) Because of the objects resistance to sinking, it float to liquid as a result of what property? a. Mass c. Density b. Buoyancy d. weight

9. b. Buoyancy

10. 5) What property of liquid refers to the attraction of every particle that pulls toward the other particles and creates a “skin” on the liquid’s surface? a. Mass c. Density b. Buoyancy d. surface tension

11. d. surface tension

12. 6) The change in an object’s position compared to a fixed object is known as? a. Motion c. apparent motion b. Distance d. acceleration

13. a. Motion

14. 7) Food factory in a plant cell, where chlorophyll is produced, is known as a. Cytoplasm c. Chloroplast b. Cellulose d. Vacuole

15. c. Chloroplast

16. 8) It describes the objects speed and direction. a. Motion b. acceleration c. average speed d. velocity

17. d. velocity

18. 9) A factor that affects motion which cause a moving object to accelerate (an example is the push orpull on an object)? a. Force c. Continuous force b. Distance d. acceleration

19. a. Force

20. 10) The smallest particle of an element that still has the same chemical properties of the element. a. compounds c. elements b. atom d. molecules

21. b. atom

22. 11. Which of the following hypotheses is written correctly? A.If frozen tennis balls will not bounce as high. B.If I heat up a tennis ball it will bounce high. C.If I freeze a tennis ball, then it will not bounce as high. D.If a tennis ball is frozen, it will not bounce as high as one that is not frozen

23. C.If I freeze a tennis ball, then it will not bounce as high.

24. 12.A scientist conducted an experiment to determine how the amount of salt in a body of water affects the number of plants that can live in the water. Which is the independent variable? Water B. Temperature of the water C. Amount of salt in the water D. Number of plants in the water

25. C. Amount of salt in the water

26. 13. A scientist conducted an experiment to determine how the amount of salt in a body of water affects the number of plants that can live in the water. In this experiment, which is the dependent variable? Water B. Temperature of the water C. Amount of salt in the water D. Number of plants in the water

27. D. Number of plants in the water

28. 14. What do you call an idea or explanation that you test through study and experimentation? A. Question B. Hypothesis C. Conclusion D. Observation

29. B. Hypothesis

30. 15. Which is true regarding water? A. Compound of element B. Element of gases C. Mixture of gases D. Substances of gases

31. D. Substances of gases

32. Grade 8

33. 1.Is mushroom a kind of plant? A.Yes . Because it has roots, stems, and seeds. B.No . Because it cannot make its own food. C.Yes . Because it produces spores. D.No . because it is poisonous.

34. 2.If the chloroplasts of a plant cell are damaged, which will it be unable to do? A.protect the cell B. make food for the cell C. excretes waste materials D. give instruction for cell to reproduce

35. 3.Cancer starts from cells that start to grow uncontrollably fast. They destroy tissues and organs. What does this say about the effects of diseased cells on the higher levels of organization in an organism? A.Cancer involves only certain kinds of cells and does not affect any other kind of cell. B.Diseased cells affect only the next higher levels of organization that they make up – the tissues. C.Diseased cells damage the higher levels of organization they make up: tissues, organs, organ systems, and eventually, the whole organism. D.Diseased cells do not affect the other parts of an organism.

36. 4.When is an object considered to be in motion? I. When its position changes with respect to a point of reference. II. When its distance changes with respect to a point of reference. III. When its direction changes with respect to a point of reference. A.I and II only C. II and III only B.I and III only D. I, II, and III

37. 5.Which is TRUE about fertilization? A.It is a form of asexual reproduction. B.No sex cells are needed for fertilization to occur. C.One type of sex cell is needed for fertilization to occur. D. Sperm and egg cells are needed for fertilization to occur.

38. 6.Elsa is sitting very still on a chair. But Jose claims that Elsa is actually moving. Jose is true if the point of reference is the _______. A. Chair B. floor C. Earth D. sun

39. 7.Find the speed of a car that travels a distance of 365 m in 22 seconds. A.16 m/s B. 16.6 m/s C. 15 m/s D. 15.6 m/s

40. 8.If you comb your hair and the comb becomes positively charged, what will happen to your hair? A.it will remain uncharged. B.it will be repelled by the comb. C. it will become positively charged. D. it will become negatively charged.

41. 9.Which of the following is accelerating? A.The earth moving around the sun. B.A car moving in a straight highway at constant speed. C.A student running around the track oval. D.A ball rolling to a stop.

42. 10.Which of the following differentiates organs from tissues? A.organs make up tissues; tissues make up organs. B.tissues make up organs; cells make up tissues. C.organs and tissues are made up of cells. D.organs and tissues make up an organ system.

43. Difficult 3 items

44. 1. What two parts of the light microscope magnify the image of an object?

45. 2. How did Mendeleev arrange the elements in the periodic table?

46. 3. A train accelerates to a speed of 20 m/s over a distance of 150 m. Determine the acceleration ( assume uniform) of the train.

47. 4. What variable needs to be constant in Charles Law?

48. 5. Who was the first scientist to determine the electron’s charge?

49. 6. How do you call the ability of an electron to attract electrons in bond ?

50. 7. Zed is playing with a ball on top of a building but the ball fell and hits the ground after 2.6 seconds, what is the final velocity of the ball just before it hits the ground and how high is the buildin g ?

51. 8. What type of mirror is used to form both real and virtual image?