For items 20 21, refer to the data below

For items 20 21, refer to the data below .I. Burning of wood

II. Melting of ice

III.Evaporation of water

IV. Condensation of water

V. Burning of paper

20. Which of the following activities listed in the box show a a physical change?

a.I, III and Vb. II, III and IVc. III, IV and Vd. I, II, III

21. Which shows a chemical change? a.I and IIb. I and IIIc. I and IVd. I and V

22. Which of the following is an example of a chemical change that is useful?

a. Changing of starch to sugarc. rusting of iron

b.Changing fuel to smoked. decaying of fruits

23. Which of the following situations give an idea of how static electricity is produced?

I. Striking two different materials against each other.

II. Striking two the same materials against each other.

III. Rubbing two different materials together.

IV.Rubbing two the same materials together.

a. I and IIb. I and III c. I and IV

24. Which of the following is a good conductor of electricity?

a.Asbestosb. copperc. plastic

25. What is the advantage of a parallel circuit over a series circuit?

d. I, II, III, IV d. rubber

a.It is easier to make

c. all the bulbs will have bright lights

b.It consumes less electricityd. when one bulb does not light, other bulbs will still light

26. Which of the following statements best describe how electrical energy is produced?

a. Electrical energy can be produced from chemicals by chemical reaction.

b. Moving magnets can produce electricity.

c. Generator consisting of a moving coil that cut through magnetic filed can produce electricity

d. All of the above

27. Which of the following statements describe how an electromagnet works?

a. It operates only when there is a flow of electricity in the coil of the wire.

b. It operates even without a flow of electricity in the coil of the wire.

c. It operates only when there is a flow of electricity without presence of coil of the wire d. It operates even without a flow of electricity in the coil of the wire.

28. Charles uses the handle of a spoon to pen a can of biscuit. What kind of a simple machine is the spoon when used in this manner?

a.Wheel and axleb. inclined planec. leverd. screw

29. When using a hammer to pull a nail, where is the effort applied?

a.On the handle

c. on the head of the

b.On the hammerheadd. on t he point of the nail

30. Wheel and axle is a simple machine, which multiply force and speed. Which of the following best describes a wheel and axle?

a.It multiplies force if it is applied on the wheel

b.It multiplies speed if it is applied on the wheel.

c.It multiplies speed of it is applied on the axle

d. It multiplies both speed and force at the same time.

31. Warning about storms and typhoons are officially given by the meteorologists of PAG- ASA. According to them, signal number 3 means ________.

a.Wind velocity is less than 60 kph.

b.Wind velocity is ranging from 60 kph to 100 kph.

c.Wind velocity is ranging from 100 kph to 180 kph.

d.Wind velocity is undetected.

32. Which among the members of the solar system that has rings made up of thousands of

ringlets of dust, water ice, and very small particles and known as the second largest planet.

a.Jupiterb. Saturnc. Uranusd. Neptune

33. Which part of the sun where light energy becomes visible?

a.Chromospheresb. photospherec. sunspotsd,. corona

34. Which of the following other members of the solar system are describes as rocky irregularly shaped objects found mostly between Mars and Jupiter?

a.Asteroidsb. cometsc. meteorsd. satellite