REVIEWER GRADE FOUR - THIRD QUARTER.pptx

REVIEWER GRADE FOUR - THIRD QUARTER.pptx

1. REVIEW 4

2. Which of the following is true about force? A. Force can change the shape or size of an object. B. Force can only change the direction of an object. C. Force cannot change the speed of a moving object. D. Force can change the chemical properties of objects

3. What do you call an act of applying force to move something towards you. A. a pull B. a push and a pull C. a push D. none of the above

4. What do you think will happen to the speed of the object when the force is applied in the opposite direction of the object in motion? A. it increases B. it remains the same C. it decreases D. none of the above

5. Suppose you push a door and your friend on the other side of the same door is also pushing it. How will you describe the force and the effect of your actions to the door? A. The door pushes you and your friend. B. The door pushes your friend away from you. C. The force is balanced and the door does not move. D. The force is unbalanced and the door may break.

6. Jecka and Atchie agreed to have a race with their toy cars. Both pushed their toy cars in one single blow. Jecka won the race. What do you think is the reason why Jecka won? A. Jecka is stronger than Atchie . B. Atchie has a smaller hand than Jecka . C. Jecka applied more force than Atchie . d. Atchie got nervous while pushing the toy car.

7. Which of these statements define a force? A. It is a push upon an object. B. It is a pull upon an object. C. It is any action that can never change the state of motion of an object D. Both A and B

8. Which of the following statements about friction is true? A. Friction opposes motion of objects. B. Friction occurs between non-rubbing surfaces. C. Friction causes moving objects to move faster. D. Friction acts in a direction similar to the direction of an object

9. When can we say that friction on a floor is greater? A. If the floor is wet. B. If the floor is rough. C. If the floor is tiled. D. If the floor is smooth.

10. Which activity is a way of reducing friction? A. applying lubricant B. putting spikes on tires C. using rubber shoes D. removing wheels on heavy cabinets

11. Which of the following statement shows the importance of friction on the movement of objects? A. Slippery roads are dangerous for fast moving vehicles. B. The soles of the slippers help one to walk without slipping. C. The brakes of cars help in increasing the motion of vehicles. D. All of the above.

12. Will it be easier for a person to push a table on a carpeted floor than on tiled floor? A. No, because the carpeted floor is rough, so friction is lesser. B. No, because the carpeted floor is rough, so friction is greater. C. Yes, because the carpeted floor is smooth, so friction is lesser. D. Yes, because the carpeted floor is smooth, so friction is greater.

13. Which of the following is true? I. Stronger friction slows down a moving object. II. Friction is not present in a smooth surface. III. Objects slide slowly on a smooth surface. IV. Smooth surface has more friction. A. I, II B. II, III C. I, III D. I, IV

14. Why do oil and lubricants applied to machine’s parts? I. To make the parts move easily. II. To make the parts move slowly. III. To prevent the parts from moving fast IV. To protect the parts from wearing down. A. I, II B. I, III C. II, III D.I, IV

15. Which of the following is attracted to a magnet? A. iron B. lead C. silver D. water

16. What is the area around a magnet where a magnetic force is found? A. magnetic axis B. North Pole C. magnetic field D. South Pole

17. Which of the following statement is correct? A. Magnets do not have force. B. All metals are attracted by magnets. C. Papers are attracted by magnets. D. The push and pull of magnets is called magnetic force.

18. Which of the following is NOT true about magnetic force? A. Like poles of two magnets repel each other. B. Opposite poles of two magnets attract each other. C. The force of attraction is greater at the middle. D. Magnets attract objects made up of iron, cobalt and nickel.

19. Which of the following statements is true? A. All magnets have two north poles. B. All magnets have two south poles. C. Magnets can attract an object made of paper. D. Most objects with iron are attracted to magnets.

20. Earth is considered as a giant magnet. How is Earth’s magnetic field similar to that of a magnet? A. It has gravitaional pull. B. It is made in Earth’s core. C. It is shaped like a horseshoe. D. It is hundreds of kilometers long.

21. What characteristics do magnetic substances have? A. They are always black and cold to touch. B. They can give a “shock” when you touch them. C. They can attract metallic objects without direct contact. D. They fall faster than other objects when you drop them.

22. What energy transfer is shown through direct contact of the heat source and the body receiving the heat? A. conduction B. convection C. radiation D. reflection

23. What will happen if light waves bounce off the surface of an object? A. it will reflect B. it will refract C. it will be absorbed D. it will become dark

24. During heating, the water at the bottom of a jar gets heated first and begins to rise. As warm water rises, cold water goes down. This shows what kind of heat transfer? A. conduction B. convection C. insulation D. radiation

25. What evidence/s show/s that light travels in a straight line? A. Shadows are formed B. Light passes through the holes which are aligned together. C. Rays of light are made of straight lines moving outwardly in all directions D. All of these

26. Grade IV pupils went camping. They lighted a bonfire and they felt their face and arms were getting warm. How did the heat from the fire transfer to the pupils? A. through conduction C. through insulation B. through convection D. through radiation

27. Which of the following statement is true? A. Light does not travel. B. Light travels in a curve line. C. Light travels in a straight line. D. Light reflects in opaque materials

28. Which of these activities show heat transfer by radiation? A. boiling egg C. lighting the room with a bulb B. heating the wire D. refrigeration

29. Which of the following is true? A. Light travels faster than sound. B. Sound travels faster than light. C. Light and sound do not travel in any medium D. Light travels at the same speed with sound.

30. What affects the speed of the sound as it travels? A. the origin of the sound B. the nature of the material C. the loudness of the sound D. the person receiving it

31. Which of these describes how light travels through an empty space? A. It travels in a straight line without stopping. B. It comes to a stop after it travels a certain distance. C. It changes direction often even if there are no objects. D. It travels straight but may change direction to avoid objects

32. Which of the following is NOT true? A. Convection is the transfer of heat energy by circulating currents. B. Conduction is the transfer of heat energy from molecule to molecule or atoms in an object. C. Heat energy transfers from a colder body or cooler region to a hotter body or warmer region. D. Heat energy transfers by convection in liquids and gases.

33. Which of the following statements about sound is correct? A. Sound cannot travel through solids. B. Sound travels faster in air than in liquid. C. Sound travels faster in solids than in air. D. Sound is not affected by the medium through which it travels.

34. Why is energy important? A. Because it can make our work easier. B. Because it can sustain life. C. Because it can make our life complicated. D. All of the choices.

35. Which is NOT one of the uses of mechanical energy? A. It can make our work easier. B. It makes our work faster. C. It helps in generating electricity. D. It is used to locate exact locations.

36. Which of the following is NOT a form of energy? A. Electrical B. magnetism C. mechanical D. thermal

37. What type of energy does an object posses if it is at rest or not moving? A. ElectRical energy B. Potential energy C. Kinetic energy D. Thermal energy

38. What type of energy does a rolling ball posses? A. Heat energy B. Potential energy C. Kinetic energy D. Thermal energy

39. What form of energy is produced by a machine or a moving part? A. Electrical energy B. Mechanical energy C. Light energy D. Thermal energy

40. A marble that is on the ground will move only when ________ A. you look at it. B. it is left on its own. C. bumped by another marble. D. another marble passes beside it.

41. BaseD on the picture, what will likely happen if the two players are pulling a rope with the same amount of force? A. Both will fall. B. The girl will win. C. The boy will win. D. They will not move at all.