physical sciences

LICENSURE EXAMINATION FOR TEACHERS PRACTICE TEST

PHYSICAL SCIENCE (MAJOR)

1. Most cars have ‘’four-stroke internal combustion engines.” Which of the following gives the correct sequence of the four strokes? A. Power-compression-intake-exhaust B. Compression-exhaust-power-intake C. Intake-power-compression-exhaust D. Intake-compression-power-exhaust

2. The image in a plane mirror is _______________. A. Inverted, virtual with a magnification of 1 B. upright, real with a magnification of 2 C. inverted, real with a magnification of ½ D. upright, virtual with a magnification of 1

3. Which of the following wave characteristics remains unchanged when a wave crosses a boundary into a different medium? A. Velocity B. Amplitude

C. Frequency D. Wavelength

4. Which of the following electromagnetic radiations has the lowest frequencies? A. Gamma rays

C. Ultraviolet rays

B. Radio waves

D. X-rays

5. If something gets a positive electric charge, then follows that something else__________. A. become magnetized B. becomes equally negatively charged C. becomes equally positively charged D. becomes negatively charged, but not necessarily equally negatively charged

6. Hydrocarbons which do NOT have maximum number of hydrogen atoms are _______. A. aromatic C. saturated B. isometric

D. unsaturated

7. Metals have been used for making coins and jewelry. Which of the following characteristics is true of metals? A. Metals are malleable and ductile B. Metals have high tensile strength C. Metals are good conductors of heat and electricity D. all of the above

8. Which of the following is that single force applied at the same point that will produce the same effect? A. reactant force B. composite force

C. resultant force D. concurrent force

9. How many grams of chloral are needed to produce 10.5 g of DDT? A. 10.5 g

C. 4.36 g

B. 8.72 g

D. 13.1 g

10. The half-life Carbon- 14 is 6739 years. Suppose a container was found to contain one half as much Carbon- 14 as a new basket of the same material. What is the approximate age of the bowl? A. 3716 years

C. 2856 years

B. 1432 years

D. 6739 years

11. What kind of energy is present whenever a body is at a distance from the ground? A. elastic potential energy B. electric potential energy C. electromagnetic potential energy D. gravitational potential energy

12. A lunar eclipse occurs when the ____________. A. moon is between the sun and the earth

B. moon, earth and sun form a right angle C. earth is between the moon and sun D. sun is in between moon and earth

13. How long does it take for the moon to go through all of its phases? A. 1 year

B. 29 ½ days

C. 24 hours D. 27 1/3 days

14. Which of these minerals is present in seawater with the highest percentage? A. Sodium chloride B. Magnesium sulfate

C. Magnesium chloride D. Calcium sulfate

15. What must be the minimum length of a plane mirror in order for you to see a full view o f yourself? A. Your full height

C. One-half

B. One-forth

D. Three-fourths

16. At what particular instance will the period and frequency of a wave changed? A. When it travels from one medium to another B. When it is at its equilibrium position C. When it interferes with another wave D. When it reflects

17. What laws states that there is decrease in pressure at the side of a moving stream of fluid? A. Bernoulli’s Law

C. Archimedes’ Law

B. Pascal’s Law

D. Hooke’s Law

18. Whose discovery involved the production of magnetism by means of electricity? A. Ohm

B. Lenz

C. Faraday

D. Oersted

19. In the absence of air friction, what happens when a balls allowed to roll down one hill and up a second hill? A. The ball would lose speed more slowly as it moves up the second hill.

B. The ball would travel a longer distance uphill. C. The ball would travel a shorter distance as it moves up. D. The ball would practically reach the same horizontal level from where it started. 20. A car travels at 80 km/hr for 0.5 hr, then goes 100 km/hr for 1 hour, and finally 60 km/hr for 0.5 hr. What is the average speed for the 2-hour travel? A. 80 km/hr

C. 100 km/hr

B. 90 km/hr

D. 85 km/hr

21. In Moh’s scale, which are the softest and the hardest mineral? A. Talc – Diamond

C. Calcite – Feldspar

B. Gypsum – Quartz

D. Talc – Corundum

22. According to the kinetic molecular theory, liquids are similar to solids in that ___________ A. their molecules are arranged in a regular manner. B. the motion of their particles changes with temperature. C. the motion of their particles cannot be determined. D. there is very little space between their molecules.

23. When two or more objects collide the quantity that does NOT change is the total __________. A. Momentum of all the objects C. kinetic energy of all the objects B. kinetic energy of each object D. momentum of each object

24. What is the correct formula for finding the efficiency of a machine? A. Efficiency = input force /output force x 100% B. Efficiency = output force/input force x 100% C. Efficiency = output work/input work x 100% D. Efficiency = input work/ output work x 100%

25. The energy of a hammer hitting a nail is A. heat

C. electric

B. chemical

D. mechanical

26. Disregarding air resistance, an object falling towards the earth’s surface has an acceleration that is _____________. A. decreasing

C. constant

B. increasing

D. depending on object’s weight

27. If the moon’s gravity becomes 1/4 that of Earth, which of the following will apply? I. The moon will no longer cause tides on the earth’s oceans. II. A 65–kilo person on earth will weigh about 18 kilos on the moon. III. It will be easy to lift heavy objects on the moon. IV. The moon will not hold a thick atmosphere of gasses. A. II, III and IV

C. I, II and III

B. I, II and IV

D. I, II, III and IV

28. The headings of a car with a 12V electrical system are 40W each the tail lights 6.0 W each, and the radios is 20 W. What is the total power of this circuit? A. 1200 W

C. 110 W

B. 240 W

D. 3600 W

29. Abundance of waste materials in water decreases primary productivity due to ___________. A. blockage of light penetration B. amount of nutrients available C. reduced amount of oxygen in the water D. accumulation of aquatic organisms

30. What is the direction of the magnetic field in an electromagnetic wave? A. parallel to the electric field

C. parallel to the motion

B. perpendicular to the electric field

D. random

31. A ball of mass 0.15 is thrown with a speed of 20 m/s against a wall. What is its momentum if it rebounds after colliding elastically? A. +3.0 kg m/s

B. -30 kg m/s

C. -3.0 kg m/s

D. +30 kg m/s

32. How are echoes minimized in halls and auditoriums? A. covering hard reflecting surfaces with curtains B. opening the doors of the auditoriums C. creating a wider space for sound to travel D. limiting the accessories installed inside

33. A large depression caused by a collapse of the slopes of a volcano is called a _________. A. basin

C. base level

B. syncline

D. caldera

34. Where does the pick up needle on a phonograph move the fastest across the record? A. At the end B. The needle move at the same speed throughout C. In the middle of the phonograph record D. At the beginning 35. Compared to the density of seawater, a kind of fish that lives at the bottom of the ocean has a density that is __________. A. lesser

C. same

B. greater

D. equal

36. The additional of Br2 is used as the reaction to distinguish between alkenes and alkanes. Which of the following observations accompanies this test? A. When Br2 is added to the double bond of alkenes to make a dibromide, it becomes colorless. B. A bright red color is produced when Br2 reacts with alkenes. C. The red color of bromine disappears when it dissolves in alkenes. D. Bromine dissolved in alkenes but not in alkenes.

37. Which statement is CORRECT about a rechargeable battery? A. Its REDOX reactions are not complete. B. Its REDOX reactions are not reversible.

C. Its REDOX reactions are complete. D. Its REDOX reactions are reversible.

38. A ray of light is incident on a plane surface separating two transparent substances of refractive indices 1.70 and 1.50. The angle of incidence is 30 deg and the ray originates in the medium of higher index. The angle of refraction is _________. A. 79.0

C. 45.0

B. 34.5

D. 26.2

39. Chrome plating is one method to prevent corrosion. This process can be carried out by_______. A. using secondary cells B. electrolytic process

C. using primary cells D. zone refining

40. What does the slope of the graph of stretching force against elongation indicate? A. elastic limit

C. gravitational limit

B. resistivity constant

D. spring constant

41. The radius of the path of an object in uniform circular motion is doubled. The centripetal force needed if its speed remains the same is ________. A. Four times as before B. Half as great as before C. Twice as much D. Three times as much

42. Car A has a mass of 1000kg and a speed of 60km/hr. car B has amass of 2000kg and a speed of 30km/hr. compare the kinetic energy foe car A with that of car B. A. Half as much B. Four times as much C. Equal D. Twice as much

43. What would be the horizontal line in a position-time graph means? A. Changing position, constant velocity B. Constant position, constant velocity C. Changing position, increase velocity D. Constant position, zero velocity

44. What is the car’s acceleration if ten seconds after the starting from rest; it is moving at 40m/s? A. 4.0m/s2 B. 10m/s2 C. 2.5m/s2 D. 0.25m/s2

45. A heavy object and a light object are released from the rest at the same height and time in a vacuum. As they fall, they have equal ________. A. Weights B. Moments C. Acceleration D. Energies

46. Airplanes are designed with pointed nose and thin tails in order to__________. A. Produce fluid friction B. Reduce drag C. Increase the lift of the wing D. Lessen the forward thrust

47. A stone was thrown upward from the roof, at the same time that an identical stone was dropped from there. The two stones will ________. A. Have the same velocity upon reaching the ground B. Take the same time to reach the ground C. Have the same acceleration when they reach the ground D. Reach the ground at the same time

48. In a pair of scissors, the fulcrum is located at the ________. A. Handle B. Screw C. Tip of the blades D. Sharp edges

49. What kind of energy is possessed by water falling from a dam? A. Potential B. Kinetic C. Accelerating D. Interacting

50. If an object were equipped with a speedometer and allowed to fall freely on a planet where the acceleration due to gravity is 20m/s2, by, how much will the reading on the speedometer increase each second? A. 30m/s B. 20m/s C. 40m/s D. 10m/s

51. According to the kinetic molecular theory, liquids are similar in solids in that _______. A. Their molecules are arrange in a regular manner B. The motion of their particles changes with temperature C. The motion of their particles cannot be determined D. There is very little space in their molecules

52. When the solid block of materials is cut in half, its density is ________. A. Unchanged B. Halves C. Doubled D. Tripled

53. A ball is launched at an angle of 60 degrees from the horizontal. What do you call the horizontal distance traveled by the ball? A. Trajectory B. Projectile C. Range D. Hyperbola

54. Which of the following is TRUE about an object thrown horizontally? A. The vertical distance traveled increases uniformly B. The horizontal motion is uniformly accelerated C. The horizontal component of velocity increases D. The velocity of the subject increases

55. In the absence of the air resistance, a projectile has a maximum range when thrown at an angle of __________. A. 90 degrees B. 60 degrees C. 30 degrees D. 45 degrees

56. A 400 N woman stands on top of a very tall ladder so she is one earth radius above the earth’s surface. How much does she weights? A. 100N B. Zero C. 200N D. 400N

57. What must be the minimum length of the plane mirror in order for you to see a full view of yourself? A. Your full height B. One-fourth C. One-half D. Three-fourths

58. A rifle recoils from firing a bullet. The speed of the recoil is slow because ___________. A. The force against the rifle is less B. The rifle has more mass than the bullet C. The impulse on the rifle is less D. The momentum of the rifle is unchanged.

59. Which statements differentiate weight for mass? A. Weight is distance from a reference point B. Weight has volume, mass has none C. Weight is a full of gravity, mass is space occupied D. Weight is a force while mass is amount of matter

60. Who established the relationship between the volume of a gas and the pressure when the temperature is constant? A. Blaise Pascal B. Robert Boyle C. Lavoisier D. Archimedes

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