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Name____________________________ Date___________________ #___ Science Test ~ Forces and Motion Chapter 3, Lessons 1 & 2 Part I: Vocabulary ____ 1. motion A. a change in the position of an object ____ 2. reference point B. the force that pulls all objects toward each other ____ 3. force C. the rate at which an object changes position ____ 4. gravity D. any push or pull ____ 5. speed E. a place or object used to determine if an object is in motion ____ 6. velocity F. the speed and direction an object is moving Part II: True/False Tell if each statement is true or false. Explain your choice. 7. A force can make a moving object stop. This statement is ________ because __________________________________________. 8. If you pedal your bike with the same force, your speed will increase. This statement is ________ because __________________________________________. 9. An object is accelerating only if it is speeding up. This statement is ________ because __________________________________________. Part III: Multiple Choice ____ 10. A teacher walks by a student’s desk. The desk was in front of the teacher and is now behind the teacher. What term describes the change in the teacher’s position compared to the desk? a. velocity b. relative motion c. relative position d. frame of reference ____ 11. Which object requires the least amount of force to move it 5 meters? a. ping pong ball b. soccer ball c. baseball d. bowling ball ____ 12. Two students push boxes with the same mass for 10 seconds. Which student has moved her box a greater distance? The student who_________________. a. pushed with less force b. who had lesser body mass c. pushed with more force d. who had greater body mass ____ 13. On which object would the force of gravity be the strongest? a. a basketball b. an apple c. a book ____ 14. Gravity is a force that makes objects __________________. a. push apart b. stop moving c. move uphill d. pull toward each other d. a truck ____ 15. A student wants to describe the velocity of a moving car. What information does the student need? a. speed and position b. speed and direction c. direction and position d. direction and relative motion ____ 16. A train goes around the corner at the same speed it was traveling on a straight track. What is this an example of? a. speed b. acceleration c. relative motion d. frame of reference ____ 17. Which of the following is NOT an example of acceleration? a. A train slowing down to stop. b. A train moving at the same speed around a corner. c. A train increasing its speed. d. A train moving at the same speed in the same direction. ____ 18. A car travels 100 miles in 2 hours. What is the car’s average speed? a. 200 mi/hr b. 100 mi/hr c. 50 mi/hr d. 102 mi/hr Part IV: Short Answer Answer the following question in a complete, turn around sentence. 19. Describe what happens to the motion of a baseball after a pitcher throws it and the batter hits it. (2 points) _________________________________________________________________________________________ _________________________________________________________________________________________ 20. You are moving heavy boxes across a room. You ask a friend to help you lift it. Why is it easier when your friend helps? (2 points) _________________________________________________________________________________________ _________________________________________________________________________________________ 21. Explain how the use of the brakes changes the motion of the bicycle. How does the mass of the bicycle affect the force that needs to be applied to the brakes? (3 points) _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ 22. Is a roller coaster’s velocity likely to stay the same during the entire ride? Why or why not? (2 points) _________________________________________________________________________________________ _________________________________________________________________________________________