Department of EducationSanta Maria District

Santa Maria West Central School

Third Periodic Test in Science V-4

Name: ___________________________________________________________________________Score: _______

I. Changes in Matter: Write a PC if the following shows physical change and CC if it shows chemical change.

_____1. Burning of wood. ________6. Boiling of water._____2. Cutting a cake into halves. ________7. Souring of milk._____3. Grinding of meat. ________8. Breaking of a glass._____4. Sweetening of a sour fruit. ________9. Burning of a candle._____5. Grilling of meat. ________10. Chopping meat into pieces

II. Changes in the Environment: Put (√) on the good effects brought about by changes in our environment and (X) if the effect is bad.

_____11. More people get employed since industry is progressive._____12. Trees are cut down to give away to urbanization._____13. Modern transport facilities pollute the air._____14. Roads become concreted and wider._____15. Shell fishes become toxic for human consumption._____16. More squatters live in urban areas._____17. Cars, buses and other transport enable people to travel easily from one place to another._____18. Computers and telephones made life easier and better._____19. Factories dump garbage and waste materials into bodies of water._____20. Industry has become progressive.

III. Electricity: Write TRUE or FALSE._____21. Protons are negatively charged particles._____22. Matter is made up of atoms._____23. When the material has the same amount of protons and electrons, it is uncharged._____24. Electricity is produced by moving electrons._____25. The center of the atom is the nucleus._____26. Static electricity is also known as moving electricity._____27. Lightning is a form of static electricity._____28. Current electricity means electricity that flows._____29. Rubbing or friction produces static electricity._____30. The human body allows electrons to pass through.

IV. Answer what is being asked.Five Safety Electrical devices31.32.33.34.35._______________36. It is a device used to control the voltage of electricity._______________37. It is used for each household appliance that allows electricity to flow freely when plugged on._______________38. It is made up of a strip of metal that melts easily when there is overloading or overheating._______________39. It measures the electrical consumption at a given time.3rd Periodic Test Science 5 Marie Jaja T. Roa

_______________40. It helps you to easily turn on or turn off the electric circuit without any danger.

V. Simple Machines: Draw a happy face if the sentence is correct and a sad face if it is not.

__________41. Machines make work complicated and slow.

__________42. Machine change the direction toward which a force is acting.

__________43. A lever is a rigid bar used to pull, push or lift objects.

__________44. A lever is a very simple machine.

VI. Match the simple machine in Column A with its picture in Column B.

COLUMN A COLUMN B

45. Pulley

46. Lever

47. Inclined plane

48. Wheel and axle

49. Screw

50.Wedge

3rd Periodic Test Science 5 Marie Jaja T. Roa