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FORCE AND MOTION M-ORAL TEST 8 TH GRADE SCIENCE

FORCE AND MOTION M-ORAL TEST 8 TH GRADE SCIENCE. Use the graph to the right to answer questions 1-3. 1. Sound travels at a speed of 340 m/s at which temperature? a. 10˚C c. 14˚C b. 11˚C d. 20˚C 2. At a temperature of 25˚C, sound travels at approximately a. 330 m/s c. 345 m/s

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FORCE AND MOTION M-ORAL TEST 8 TH GRADE SCIENCE

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  1. FORCE AND MOTION M-ORAL TEST 8TH GRADE SCIENCE

  2. Use the graph to the right to answer questions 1-3. • 1. Sound travels at a speed of 340 m/s at which temperature? • a. 10˚C c. 14˚C • b. 11˚C d. 20˚C • 2. At a temperature of 25˚C, sound travels at approximately • a. 330 m/s c. 345 m/s • b. 347 m/s d. 350 m/s • What is the relationship between air temperature and the speed of sound? • a. As air temperature increases, the speed of sound decreases • b. As air temperature increases, the speed of sound increases • c. As air temperature increases, the speed of sound remains the same

  3. Use the diagram to the right to answer questions 4-5 • 4. The tool shown in the diagram is best used to measure • a. Force c. Volume • b. Weight • 5. The tool shown in the diagram measures in which units? • a. Ounces c. Newtons • b. Milliliters

  4. Use the table above to answer question 6 • 6. If a force of 50N is applied to each of the three objects, which one will have the greatest acceleration? • a. Object X because it has the greatest mass • b. Object Z because it has the least mass • c. Object Y because it has the least volume • d. Object Z because it has the greatest volume

  5. 7. A driver traveled 270 km in 3 hours. The driver’s destination was still 150 km away. What was the drivers speed at this point? • a. 40 km/h c. 90 km/h • b. 140 km/h d. 420 km/h • Motion is a change in _______ • a. Speed c. Force • b. Velocity d. Position • 9. You use distance and time to calculate a rate of _______ • a. Speed c. Displacement • b. Force

  6. 10. The force that opposes motion is ________ • a. A balanced force c. An accelerating force • b. An unbalanced force d. Friction • 11. Force is defined as a _____________ or a _____________ • a. Shove, push c. Kick, pull • b. Push, slide d. Push, pull • 12. When a car slows down at a traffic light, it is _________ • a. Accelerating c. Decreasing its displacement • b. Traveling at constant velocity

  7. Every force has an ________ force. • a. Equal and opposite c. Long-Range • Reaction d. Accelerating • 14. When two birds are pulling on a worm and the worm moves toward the first bird, you know that the forces are: • a. Long-range c. Unbalanced • Action-reaction d. Balanced • 15. A bike travels 6 km/hr. This is an example of ___________. • a. Distance c. Motion • b. Displacement d. Speed

  8. 16. Any change in speed or direction is known as _________. • a. Inertia c. Force • b. Acceleration • 17. The amount of inertia an object has depends on its: • a. Mass c. Volume • b. Density d. Length • ____________ energy is the energy of motion. • a. Solar c. Potential • b. Thermal d. Kinetic

  9. The type of forces that cause motion are _________ • a. Balanced c. Unbalanced • b. Friction • 20. Which item below would have the most inertia? • a. bowling ball c. golf ball • b. tennis ball d. ping-pong ball • 21. A frog jumps from lily pad to lily pad and covers a distance of 15 meters. If he jumps at a rate of 3 m/min, how long will it take for him to jump that distance? • a. 5 minutes c. 45 minutes • b. .5 minutes d. .45 minutes • Which of Newton’s Laws best explains the idea of inertia? • a. First law c. Second law • b. Third law d. Both b & c

  10. C D B A 23. Using the above scenario, where does the car have the greatest potential energy? a. A b. B c. C d. D 24. Using the same scenario, where does the car have the greatest kinetic energy? a. A b. B c. C d. D

  11. D C B A 25.Calculate the speed for trial 1: a. 2 m/s b. 2 mph c. 4.5 mph d. 4.5 m/s 26. Calculate the speed for trial 2: a. 1 m/s b. 1 mph c. 10 m/s d. 10 mph

  12. D C B A • 27. Calculate the speed for trial 3: • a. 5 m/s • b. 0.5 m/s • c. 5 mph • d. 50 m/s

  13. BLAST FROM THE PAST: 28. Which step in the scientific method involves predicting the solution to the problem? • a. Purpose • b. Experiment c. Analysis d. Hypothesis In the experiment, “If I stop feeding the 7th grade students lunch, then they would decrease the amount of weight gained ,” what is the independent variable? a. Amount of weight gained b. Which lunch the students have c. Not feeding the 7th graders. d. 7th Graders don’t need to eat anyway.

  14. 30. According to the graph below, at what ocean depth would the pressure be equal to eleven atmospheres? a. 90 m b. 100m c. 110 m d. 120 m 31. What unit of measurement was used for the dependent variable in the graph of question number 36? a. Pressure b. Meters c. Atomsphere d. Celsius

  15. 32. If you saw these safety symbols before starting a lab, what would it indicate you should not do during the lab? a. You shouldn’t taste anything, since it is toxic. b. You should be careful with the supplies because they are easy to catch on fire. c. Both A and B d. Neither A or B

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