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Nawabegh Al-Riyadh International School Name: Quarter: 4 Date: Week # 16 Subject: Science Grade: 5 Revision sheets Q1. Answer the following questions. 1. How do forces affect motion? ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ 2. When might kinetic energy change into sound energy? ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ 3. How is heat transferred? ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ 4. Is there more energy in a 30 dB or 40 dB sound wave? Why? ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ Page 1 of 5 Q2. Define the following. 1. friction ______________________________________________________________________ ______________________________________________________________________ 2. unbalanced forces ______________________________________________________________________ ______________________________________________________________________ 3. law of conservation of energy ______________________________________________________________________ ______________________________________________________________________ 4. temperature ______________________________________________________________________ ______________________________________________________________________ 5. heat ______________________________________________________________________ ______________________________________________________________________ 6. convection ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ 7. conduction ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ 8. sound wave ______________________________________________________________________ ______________________________________________________________________ Page 2 of 5 Q3. Write “True” or “False”. 1. A rock at the top of a mountain does not have energy. _______________ 2. Amplitude is the number of times an object vibrates per second. _______________ 3. Heat is the kinetic energy in the vibrations of particles. _______________ 4. Moving objects will not stop moving until acted upon by a balanced force. _______________ 5. Newton’s third law is also known as the law of inertia. _______________ 6. Acceleration is the increase in speed over time. _______________ Q4. Write the scientific term that describes each sentence. 1. the use of force to move an object a certain distance or change an object _____________ 2. a change in an object’s position over time ______________ 3. a group of objects from which a position or motion is measured _______________________________ 4. the ability of a material to transfer heat _____________________________ 5. forces that act together on an object without changing its motion ___________________________ 6. the initial push or pull of one object on another ______________________ 7. the push or pull of a second object back on the object that started the push or pull ___________________ 8. energy stored in the position or structure of an object ______________________ 9. the transfer of heat through electromagnetic rays _________________ 10. a space which contains little or no matter ___________________ Q5. Fill in the blanks. 1. ___________________ is the transfer of energy when a wave disappears into a surface. 2. _________________ is most responsible for winds on Earth. 3. A(n) ______________ is a sound wave being reflected. 4. Sound waves need to travel through a _________________. 5. _________________ is a force that opposes motion. Page 3 of 5 Q6. Match each term on the right to its meaning on the left. Write the letter on the blank. _______1. the location of an object A. pitch _______2. any push or pull by one object on another B. momentum _______3. the energy of a moving object C. position _______4. how high or low a sound is D. acceleration _______5. a substance through which a wave travels E. kinetic energy _______6. the speed and the direction of a moving object F. force _______7. the mass of an object multiplied by its velocity G. medium _______8. a change in velocity with respect to time H. velocity Q7. Choose the correct answer. 1. Which unit is used to describe an object’s acceleration? a. m b. m/s c. (m/s)/s 2. Which describes how objects tend to resist changes in motion? a. distance b. inertia c. speed 3. If unbalanced force acting on an object is increased, the object will ___________. a. accelerate more b. remain at constant velocity c. remain still 4. If a car accelerates on a level road, it gains ______________ energy. a. chemical b. potential c. kinetic b. watt c. newton 5. Which is a unit of work or energy? a. joule 6. If the same force is applied to each object, which will have the greatest acceleration? a. b. c. 7. According to the law of conservation of energy, when an object gains kinetic energy, it loses ________________. a. potential energy b. power Page 4 of 5 c. electricity 8. The graph below shows the speed of an object over a 12-second period. At which time interval is the object’s acceleration zero? a. 0 – 4 b. 4 – 7 c. 7 – 9 9. What will happen if a ball and a feather are released from the same height at the same time? a. the feather will hit the ground first b. the ball will hit the ground first c. both the objects will hit the ground at the same time 10. What would you need to do to decrease the force of attraction between Earth and an object? a. decrease the distance between Earth and the object b. increase the mass of the object c. increase the distance between Earth and the object 11. On Earth, which forces tend to slow down an object? a. friction and drag b. drag and inertia c. gravity and drag 12. Which demonstrates balanced forces? a. a kite falling to the ground b. a bus accelerating around a curve c. a bicycle leaning against a building 13. The loudness of a sound depends on the sound wave’s _______________. a. frequency b. pitch c. amplitude 14. Which of the following is not a kind of kinetic encrgy? a. magnetic energy b. electricity Page 5 of 5 c. sound energy