SCI8E.docx
- 1. 1st QUARTER EXAMINATION GRADE 8 SCIENCE Name: Grade and Section Direction: Read each statement carefully. Write the letter of your answer before each number. 1. What is the SI unit for force? a. Newton c. Joule b. Kilogram d. Second 2. Who is the proponent of Three Law of Motion? a. Isaac Newton c. Thomas Edison b. Aristotle d. Alexander Graham Bell 3. When a cabinet touches the floor, which type of forces exist? a. Contact forces c. Balance forces b. Non-contact force d. Unbalance forces 4. When an object from a certain height falls freely. Which of the following happens to Potential and kinetic energy when it’s half on its way down. a. Loses potential energy and gains kinetic energy b. Gains potential energy and loses kinetic energy c. Loses both potential energy and kinetic energy d. Gains both potential energy and kinetic energy 5. Which of the following has the greatest influence on the amount of kinetic energy of a car while travelling on a road? a. mass c. size b. speed d. weight. 6. Gravitational and potential energy depends on the and of the object. a. Heights and mass b. Friction and movement c. Mass and movement d. Height and friction 7. What is the speed of sound in dry air at 0 1℃? a. 31 m/s c. 3000 m/s b. 331 m/s 300000 m/s 8. How much is the increase in the speed of sound in the air for every 1℃ increase in temperature? a. 0.06 m/s c. 6 m/s b. 0.6 m/s 60 m/s 9. Which of the following does the speed of sound wave depend? a. loudness c. temperature b. pitch d. thickness 10. Which has the greatest energy among the colors in a rainbow? a. green c. orange b. red d. violet 11. Among the following colors in a rainbow, which has the least energy? a. green c. orange c. red d. violet 12. What is the SI unit of voltage? a. ampere c. ohm b. volt d. watt 13. What is the SI unit of current? a. ampere c. ohm c. volt d. watt 14. Who formulate the works of Electricity? A. Isaac Newton c. Thomas Edison c. Aristotle d. Ohm 15. Which has the greatest inertia? a. airplane c. car b. jeepney d. bike 16. Which of these vehicles moving at the same velocity is difficult to stop? a. bus c. a car b. Train d. a truck 17. Which law of motion states that forces act with equal magnitude and in opposite direction? a. Law of Inertia c. Law of Interaction b. Law of Acceleration d. Law of Gravitational Force 18. What happens to the kinetic energy of an object if its speed is doubled? a. twice as much c. thrice as much b. increases four times d. decreases four times Region XII DIVISION OF SARANGANI South Glan District ELENA M. MIPAÑA NATIONALHIGH SCHOOL San Jose, Glan, Sarangani Province
- 2. 19. Which of the following statements is TRUE about potential energy? a. It is dependent on the speed of an object. b. It does not depend on the mass of the object. c. It does not depend on the strength of gravity. d. It is affected by the mass and location of an object with respect to the ground. 20. Which wave property is observed when a boy shouts and hears his own voice inside the church? a. echolocation c. b. Refraction d. both reflection and refraction 21. Which of the following describes refraction? a. turning back of waves b. meeting of sound waves c. bending of waves around edges of barriers d. changing the speed and direction of waves 22. What is the acronym used to remember visible light? a. DOGFOUND c. KTPERRY b. ROYGBIV d. ROMERO 23. ;What is the amount of current when 60 coulombs of charges pass through a circuit in 10 seconds? a. 3 A c. 4 A b. 5 A d. 6 A 24. Which of the following is the correct statement of Ohm’s Law? a. When current increases in a circuit, voltage increases and resistance increases. b. When current increases in a circuit, voltage decreases and resistance increases. c. When current increases in a circuit, voltage increases while resistance remains constant. d. When current decreases in a circuit, voltage decreases and resistance increases. 25. It is the number of charges passing through a wire per unit time. a. current c. power b. resistance d. voltage 26. How do forces occur? a. in pairs c. in triplets b. by themselves d. as single quantity 27. When you move a table across the floor, what force must your push be stronger than? a. friction c. magnetic b. normal d. tension 28. How do you compare the PE of the moving object at the highest point compared to its KE? a. .PE is greater than KE c. PE is equal to KE b. PE is lesser than KE d. KE is greater than PE 29. The following applies the concept of potential energy EXCEPT: a. water in a dam c. a person playing the guitar b. . a rock sitting at the edge of a cliff d. tree branches high up in a tree 30. Which of the following explains why echo is heard in an empty gym? a. Sound travels in waves. c. Sound is unpredictable. b. Sound has nowhere to go. d.There are only hard surfaces so sound only reflect. 31. When sound wave travels through the air and hits a glass of water. Which of the following happens when the sound wave moves from the air into the glass? a. It gets louder. b. It gets quieter. c. It travels faster. d. It travels slower. 32. Which property of light enables the formation of a rainbow? I. color separation II. dispersion III. reflection IV. refraction a. I and III b. II, III, and IV c. I, III and IV d. I, II, III, IV 33. Red is the least bent among the seven colors because it has the ___________. a. lowest frequency c. highest frequency b. longest wavelength c. shortest wavelength 34. Jebril sent a white light arrow through a prism. As a result, he observed the light dispersing into ___. a. four colors b. three colors c. five colors d. seven colors 35. How many coulombs does a 3-A current have in one second? a. 3 C b. 4 C c. 5 C d. 6 C 36. Dexon and Kiean pull a rope in a tug-of-war. Each pull with a 300 N force. What is the net force? a. 0 N b. 300 N c. 600 N d. 900 N 37. Zyrene throw 2 balls, she throw a green ball higher from the ground than a yellow ball and both have the same mass, which ball has more potential energy? a. green ball b. yellow ball c. both has the same PE d. both has the same KE 38. Which phenomenon explains why sound is heard at longer distances at night than in day? a. echolocation b. reflection c. refraction d. reverberation 39. What can prisms do? a. Change sunlight into a single color. b. Invert a light ray’s frequency and wavelength. c. Separate the incoming light into its constituent colors. d. Slow down light to few meters per second, when used back to back. 40. Ampere is a unit of what electrical quantity? a. current b. load c. resistance d. voltage 41. What refers to how large or strong is the force? a. magnitude b. line of action c. velocity of the object d. direction of the force 42. Which of the following is not a factor affecting the speed of sound? A. elasticity b. loudness c. temperature d. air 43. Xyra is weighting 80Kg and she is jogging at a velocity of 4 4 m/s. what is the kinetic energy?
- 3. a. 640 J b. 630 J c. 620 J d. 650 J 44. What is the temperature of air if the speed of sound is 346 m/s? a. 346 b. 347 m/s c. 348 m/s d. 349 m/s 45. A mass of 2 Kg is taken from the ground to the heights of 10m. Find the potential energy of the object. a. 200 J B. 210 J c. 220 J d. 230 J 46. Planet Jupiter has a bigger mass than the Earth. If you were able to travel to planet Jupiter, what happens to your weight? a. increases b. decreases c. stays the same d. varies with day and night 47. What is the electric current if a circuit has a resistance of 100 Ω and a voltage of 6.00 V? a. 0.0600 A b. 4.50 A c. 6.00 A d. 12.5 A 48. What is the voltage of a circuit that has a resistance of 6 kΩ and a current of 2 m /a? a. 9 V b. 10 V c. 11 V d. 12 V 49. Calculate the voltage if the current passing through the wire is 3 A, and has a resistance of 10 Ω. a. 6 V b. 30 V c. 75 V d. 150 V 50. What will happen to the current if the voltage is reduced to one half? a. tripled b. doubled c. decreased by one half d. decreased by one fourth “Educating the Mind, without educating the Heart is no Education at all” Aristotle Prepared By: SHAINA J. TALANGIN