Republic of the Philippines
Department of Education
Region III
SCHOOLS DIVISION OF NUEVA ECIJA
Old Capitol Compound, Burgos Avenue, Cabanatuan
THIRD PERIODICAL TEST
Grade 7 Science (K to 12)
S.Y. 2017-2018
NAME: _________________________________
SECTION: ____________________
DATE: _____________________
SCORE: ___________________
I. Multiple Choice: Read each question carefully and encircle the letter of the best answer from the four
choices.
1. In a 200 meter dash competition. How do you compute for the average speed of each athlete?
a. Multiply 200 meters by the recorded time of travel.
b. Divide 200 meters by the recorded time of travel
c. Divide the recorded time by twice the recorded time of travel
2. How can we say that an object is in motion?
a. It moves
c. it change in position
b. It does not move
d. it does not change in position
3. Which of the following is true about an object that travels 5 meters to the left, then 2 meters up, then another 5
meters to the right?
a. The displacement for the object is equal to 12 meters.
b. The total distance travelled by the object is equal to 12 meters.
c. The displacement of the object is equal to 12 meters down.
d. The total distance travelled by the object is 12 meters down.
4. Which of the following statement is NOT true about the object moving with constant speed?
a. The object is not accelerating
b. The speed of the object is equal to zero
c. The distance travelled by the object increases uniformly.
d. The speed of the object remains the same throughout the travel.
5. How do we know that waves carry energy?
a. When waves can set other objects into motion.
b. When it is longitudinal wave.
c. When waves are not transported.
d. When it is a combination of longitudinal and transverse wave.
6. It refers to the distance between any successive identical parts of the wave.
a. Amplitude
b. Wavelength
c. Frequency
d. Energy
7. Mechanical waves transport energy from one place to another through….
a. Alternately vibrating particles of the medium.
b. Particles travelling with the wave.
c. Vibrating particles and travelling particles.
d. None of the above.
8. In a transverse wave, the individual particles of the medium…
a. Move in circles
c. Move parallel to the direction of travel
b. Move in ellipses
d. Move perpendicular to the direction of travel
9. The higher the frequency of the wave,
a. The lower its speed
c. the greater the amplitude
b. The shorter its wavelength
d. the longer its period
10. Waves in a lake are 5 meters in length and pass an anchored boat 1.25 seconds apart. The speed of the wave is…
a. 0.25m/s
b. 4.00m/s
c. 6.2m/s
d. impossible to from the given
11. Energy from the sun reaches the earth through….
a. Ultraviolet waves
c. Mechanical waves
b. Infrared waves
d. Electromagnetic waves
12. What is the time required for one complete wave to pass a particular point?
a. Speed
b. Period
c. Frequency
d. Wavelength
13. Elsa is sitting very still on a chair. But Jose claims that Elsa is actually moving. Jose is true if the point of
reference is the ____.
a. Chair
b. Floor
c. Earth
d. Sun
14. Which of the following objects will produce sound?
a. Soft objects
b. radio stations c. vibrating objects
d. objects under pressure
15. A toy when whirled has a uniform speed and moved in a circular path. Which of the following assumptions is
TRUE?
I.
II.
a. I
The toy has a uniform body.
The toy is accelerating.
b. II
c. both I and II
d. neither I and II
16. Compared to a thin string of the same length and tightness, a thick string produces sound of….
a. The same pitch b. Lower pitch
c. higher pitch
d. lower then higher pitch
17. A sound wave is a ____________
a. Longitudinal wave
c. Standing Wave
b. Transverse wave
d. Shock wave
18. Which of the following is not capable of transmitting sound?
a. Air
b. Water
c. Steel
d. vacuum
19. Which of the following would most likely transmit sound best?
a. Steel in cabinet
c. Air in your classroom
b. Water in the ocean
d. water in swimming pool
20. Which of the following is not an electromagnetic wave?
a. Infrared
b. Radio
c. Sound
d. X-ray
21. How does the wavelength of infrared compare with the wavelength of the ultraviolet waves?
a. Infrared waves have longer wavelength.
b. Infrared waves have shorter wavelength.
c. IR waves have the same wavelength as the UV waves
d. IR waves is not comparable in wavelength with the UV waves.
22. Among the electromagnetic waves, which has the highest frequency?
a. Infrared radiation
c. Ultraviolet
b. Radio Wave
d. Gamma Rays
23. What is produced by the vibration of elastic band?
a. Sound
b. Light
c. Heat
d. Electricity
24. When you touch a piece of ice with your finger, energy flows _____.
a. From your finger to the ice.
c. both ways
b. From the ice to the finger.
D. energy does not flow.
For item numbers 25-27, refer to the list below.
The table gives a list of hypothetical materials and their corresponding conductivities in Watt/(m·K).
Materials
A
B
C
D
E
Description
Solid Metal
Solid Metal
Solid
Liquid
Gas
Conductivities (Watt/(m·K)
450
150
2.0
0.60
0.04
25. What can be inferred from the given data?
I. All materials are good conductors of heat.
II. Metals are good conductors of heat.
III. Gases are poor conductors of heat.
26.
27.
28.
29.
30.
31.
32.
33.
34.
a. I and III
c. I and II
b. II and III
d. All statements are true
Which material can be best used as cooking ware?
a. Materials A and B
c. Materials C and D
b. Materials C and B
d. Materials D and E
Which material can be best used as handles/grips of cooking utensils?
a. Material A
c. Material C
b. Material B
d. Material E
What brightness depends on the person’s perception?
a. Qualitative brightness
c. Quantitative brightness
b. Luminous brightness
d. Total brightness
Mika Reyes ran 100m dash in 10.0 seconds. What was her average speed?
a. 10m/s
c. 11m/s
b. 10.5m/s
d. 11.2 m/s
If you want to know where the typhoon would be after 12 hours, which of the following will you consider?
a. Speed
b. Acceleration
c. Velocity
d. Distance
How does the energy from the sun reaches the earth?
a. Ultraviolet waves b. Mechanical wave c. Infrared wave
d. Electromagnetic wave
Which of the following best describes a high frequency sound?
a. Low pitch
c. High pitch
b. Lower Energy
d. A and C
What type of guitar string is used to produced highest note of a guitar?
a. Thinnest string
c. thickest string
b. Smallest string
d. biggest string
Which of the following best describes the highness or lowness of a sound?
a. Pitch
b. Frequency
c. Resonance
d. Acoustic
35. Which of the following is produced by vibrating bodies?
a. Sound
b. Intensity
c. Pitch
d. Frequency
36. How would you relate pitch and frequency?
a. The higher the frequency the higher the pitch
b. The higher the frequency the lower the pitch
c. The lower the frequency the higher the pitch
d. The shorter the sound wave the higher the pitch
37. What is the unit used to determine the intensity level for sound?
a. Decibel
b. Hertz
c. Celsius
d. Volt
38. Inside an air-conditioned room, metallic objects generally feel cooler to touch than wooden objects. Why is yhis
so?
a. Heat tends to flow from metal to wood.
b. Metal heats up and cools down faster than wood.
c. Wood contains more heat than a metal of the same mass.
d. The human body resembles wood more closely than it resembles.
39. Which of the following statements pertaining to a vacuum flask (thermos) is NOT correct?
a. Silvering reduces radiation loss.
c. Vacuum reduces conduction loss.
b. Vacuum reduces radiation loss.
d. Vacuum reduces convection loss.
40. ROYGBIV is the basic component of white light. Which color of light carries the most energy?
a. Violet
b. Blue
c. Green
d. Red
41. The phenomenon in which Prism separates white into its component colors.
a. Brightness
b. Dispersion
c. Refraction
d. defraction
42. Extremely low sound frequency which is below 20,000hz.
a. Infrasonic Frequency
c. 2D echo
b. Ultrasonic Frequency
d. chemotheraphy
43. Extremely High sound Frequency which is beyond 20,000Hz.
a. Infrasonic Frequency
c. 2D echo
b. Ultrasonic Frequency
d. chemotheraphy
44. Waves in a rope produced a transversed waves because individual segments of the rope vibrate _____________
to the direction in which the wave travels.
a. Parallel
b. circular
c. peripheral
d. none of these
45. When each portion of a coil spring is alternatively compressed and extended, ____________are produced.
a. Parallel
b. circular
c. peripheral
d. none of these
46. Heat transfer by convection occurs ______.
a. Only in gases
c. only in fluids
b. Only in liquids
d. in gases, liquids and solids
47. Why does an earthquake considered an example of a mechanical wave?
a. Earthquake only felt through its medium the ground
b. Earthquake intensity differs
c. Earthquake can destroys houses and buildings
d. None of the above
48. Which electromagnetic spectrum that has the shortest wavelength?
a. Gamma ray
b. radio wave
c. microwave
d. x-ray
49. Which of the following statement is TRUE to describe sound?
a. Sound is produced by vibration of medium or material
b. Sound cannot travel in a vacuum
c. Sound travel fastest in gas.
d. None of the above
50. Why is prolong used of mobile phones may cause ear infection?
a. Due to a higher energy emitted by radio waves in communication device.
b. Due to higher frequency emitted by radio waves.
c. Due to wavelength emitted by radio wave.
d. None of the above
e.
Prepared by
ORPHA F. MANGULABNAN
Head Teacher III, Science Dept.
Reviewed and Checked:
ROSEMARIE Z. BURAYAG
OIC- Education Program Supervisor, Science
Noted:
JAYNE M. GARCIA, Ed.D
OIC- Chief, Curriculum Implementation
ANSWER KEY
1. B
2. C
3. B
4. B
5. A
6. B
7. A
8. D
9. B
10. B
11. A
12. B
13. D
14. C
15. B
16. B
17. A
18. D
19. A
20. C
21. A
22. D
23. A
24. A
25. B
26. A
27. C
28. A
29. A
30. C
31. D
32. C
33. A
34. A
35. A
36. A
37. A
38. B
39. B
40. A
41. B
42. A
43. B
44. C
45. A
46. C
47. A
48. A
49. A
50. A