5. Which of the following shows that electrical energy is transformed to sound energy? When ______________________________.

A. passenger gets off his car

B.passengers in the car talk

C,the policeman blows its whistle

D.the driver blows the horn of the car


6. At 7:00 in the evening, Nika is studying her lesson, when suddenly all her environment turned black. She can’t see anything, what form of energy is missing? I-heat energy II-light energy III-sound energy IV-electrical energy


A,I and II

B,i and III

C,II and IV

D,III and IV


7. We use an ax to chop woods. The metal part of the ax is the one that cut the wood into smaller pieces. What type of simple machine is an ax?


A,inclined plane

B,pulley

C.wedge

D,wheel and axle


8. A hammer being used by a carpenter to remove a nail from a piece of wood is an example of what simple machine?


A.wheel and axle

B.inclined plane

C.lever

D.screw


9. Who among the following is using a pulley?


A,Sarah is fetching water from the well.

B,Nina is helping her mother in cutting vegetables.

C,Sergio is unloading the packages from the truck.

D,Randy is opening the can goods he bought in the sari-sari store.


10. How does using an inclined plane make lifting a load easier?


A,It decreases the force needed to lift a mass.

B,It increases the force needed to lift a mass.

C, It decreases the mass of an object.

D,It increases the mass of an object.