Grade 7 Integrated Science: Diagnostic Test

Republic of the Philippines
DEPARTMENT OF EDUCATION
Region IV-A CALABARZON
DIVISION OF LAGUNA
Santa Cruz

Grade 7 - Integrated Science
Diagnostic Test – SY 2012-2013

Direction: Choose the letter of the best answer and write it on your answer sheet. If the answer is not among the choices write e.

Quarter 1
1. Which of the following is an example of a solution?
a. Vinegar
b. Halo-halo
c. Sand in water
d. Oil in water

2. Which statement describes the solute?
a. It is the solid formed in solution.
b. It is the liquid part of the solution.
c. It is the component of a solution in smaller amount.
d. It is the component of a solution in bigger amount.

3. The label of the 200-mL rubbing alcohol that Mrs. Herrera bought shows that it contains 40% ethyl alcohol. What is the volume of ethyl alcohol does the rubbing alcohol contain? a. 60-mL b. 70-mL c. 80-mL d. 90-mL

For items 4-5: A group of students was asked to investigate how fast sugar dissolves in cold and in hot water?

4. If this is going to be a fair test, what variables should they control?
a. Amount of water and sugar in each cup, method of stirring, time when the solid is added to water, how long each solution is stirred.
b. Amount of water and sugar in each cup, method of stirring, how long each solution is stirred.
c. Amount of sugar in each cup; method of stirring, time when the solid is added to water, how long each solution is stirred.
d. Amount of water in each cup, method of stirring, time when the solid is added to water; how long each solution is stirred.

5. What is the dependent variable (what is being measured)?
I. The temperature of water.
II. The amount of sugar.
III. The length of time that sugar completely dissolves in hot water.
IV. The length of time that sugar completely dissolves in cold water.
a. I only c. II and III
b. II only d. III and IV 6. You were tasked to check if the liquid sample you have is a substance or a mixture. Which among these tests is the BEST way to do so?
I. Color comparison
II. Taste comparison
III. Boiling test
IV. Melting test
a. I, II, III and IV c. I, II and IV only
b. I, II and III only d. I and III only

7. A liquid has the following properties: one-phase, colorless, boils at varying temperature. Which of the following BEST describes the liquid?
a. Solution
b. Substance
c. Suspension
d. Coarse mixture

8. Jill has an unopened box of a 2-meter foil labeled 100% made of aluminum. Aluminum is a substance. Jill takes just a thumb-size piece of the aluminum foil. Which of the following statements is TRUE about the piece of aluminum foil that Jill took compared with the rest that was left in the box?
a. Its mass and melting behavior are different.
b. Its mass and melting behavior are the same.
c. The mass is different but the melting behavior is the same.
d. The mass is the same but the melting behavior is different.

9. Which of the following statements is TRUE?
a. Ferrous sulfate cannot be broken down into simpler substances.
b. Compounds are made up of one kind of element.
c. Water is composed of more than two elements.
d. Compounds are more complex than elements.

10. Calcium chloride is a compound of the two elements calcium and chlorine. Which of the following statements is TRUE?
a. Calcium chloride is listed in the periodic table.
b. The symbol for calcium chloride includes Ca and Cl.
c. Chlorine may still be broken down into a simpler form.
d. Calcium and chlorine belong to the same group in the periodic table.

For questions 11 to 12. Refer to the information below. Write the symbols only.

11. Which compound melts above 1000oC and boils above 2000oC? a. NCl3 c. Na2CO3 b. SiO2 d. Mg

12. Which element is gaseous at room temperature? a. NO c. Fe b. Ca d. He

13. Arrange the following household items: toothpaste, bath soap, tap water, vinegar from the most acidic to most basic?
a. tap water, milk, toothpaste, vinegar
b. milk, tap water, vinegar, toothpaste
c. toothpaste, milk, tap water, vinegar
d. vinegar, tap water, milk, toothpaste

14. Which of the following elements is most likely ductile at room temperature?
a. Sulfur
b. Mercury
c. Nitrogen
d. Aluminum

15. An element was subjected into flame and the acidity of the oxide formed was tested. Solution of this oxide turned red litmus paper to blue. Which is most likely that element?
a. Chlorine
b. Nickel
c. Phosphorus
d. Silicon
Quarter 2
16. The heart pumps blood that carries oxygen and nutrients to the different parts of the body. To which organ system does the heart belong?
a. Circulatory
b. Digestive
c. Excretory
d. Reproductive

17. Each part of an organ system plays a specific function. Which of the following structures does not match its function?
a. Eyes : Sight
b. Kidneys : Respiration
c. Heart : Circulation
d. Stomach : Digestion

18. Flowers are the reproductive organs of plants. How are flowers different from the reproductive organs of animals?
a. Flowers have male and female parts; animals have either male or female parts.
b. Flowers need pollinators like bees to reproduce; animals do not.
c. Flowers are shed from time to time; nothing is shed from animals.
d. There is no difference between flowers and the reproductive organs of animals.

19. At which smallest level of organization in an organism can the characteristics of life be carried out?
a. Organ system c. Tissue
b. Organ d. Cell

20. Which is the correct sequence – from biggest to smallest – of the levels of organization in an organism?
a. Cell Organ Organ System Tissue
b. Organ Organ System Tissue Cell
c. Tissue Cell Organ Organ System
d. Organ System Organ Tissue Cell

21. Which two parts of the light microscope magnify the image of an object?
a. eyepiece and mirror
b. eyepiece and objectives
c. objectives and mirror
d. objectives and diaphragm

Use the letters in the figure to answer question 22.

22. It moves the body tube and objectives up and down.

23. Which of the following can be observed using the light microscope?
a. acacia bark
b. five peso coin
c. piece of stone
d. tip of gumamela leaf

24. Which of the following structures are NOT involved in asexual reproduction?
a. Gametes c. Stem
b. Tuber d. Root

25. A farmer wants to propagate a good variety of a crop in a way which maintained all its desirable traits. Which of the following methods should be used?
a. Self-pollination
b. Vegetative propagation
c. Growing seeds produced from this variety
d. Cross-pollinating this crop with another good variety and growing the seeds resulting from the cross

26. A sperm cell unites with an egg cell to form a zygote. Which process is taking place?
a. Pollination c. Asexual reproduction
b. Fertilization d. Vegetative propagation

27. Which species can produce offspring that are genetically different from their parents?
a. A species that has few variations
b. A species that reproduces asexually
c. A species that reproduces sexually
d. A species that competes with a similar species

28. A plant needs water, radiant energy, minerals, oxygen, and carbon dioxide to live. This statement shows that an organism depends on which of the following?
a. Abiotic components
b. Biotic components
c. Climate
d. Minerals

29. Setting up an aquarium that represents a mini ecosystem has to have which of the following requirements?
a. Fish and water only
b. Water, sand, soil, and light only
c. Populations of fish, snails, and plants only
d. Communities of different species of organisms, water, sand, soil, and sunlight

30. Which of the following is the correct food chain?
a. Grass →grasshopper→ maya bird→hawk
b. Grass →grasshopper→snake→frog→ hawk
c. Grass → mouse →snake→ hawk
d. Grass →mouse→ crocodile
Quarter 3
31. To determine the acceleration rate of an object, you must calculate the change in velocity during each unit of
a. speed b. time c. motion d. deceleration

32. Which of the following is an example of a vector quantity?
a. A student walks 2.0 km north.
b. An object has a mass of 10.5 kg.
c. A 1.0 kg object moves at 18 m/s.
d. A ball has a maximum speed of 15 m/s.

33. A car has an oil drip. As the car moves, it drips oil at a regular rate, leaving a trail of spots on the road. Which of the following diagrams of the car’s trail of spots shows the car continuously slowing down?

a. c.

b. d.

34. The graph below shows the speed of an object during a 10 s time interval.

In which of the following time intervals is the speed of the object decreasing?
a. between 0 s and 2 s c. between 6 s and 8 s
b. between 2 s and 4 s d. between 8 s and 10 s

35. The graph below shows velocity measurements made as a car moved north for 25 s.

How far did the car move during the first 15 s of the trip?
a. 20 m b. 25 m c. 300 m d. 500 m

36. A teacher asks a group of students to use a ruler to measure the amplitude of the wave shown below.

Between which of the following points should the amplitude be measured?
a. points U and Z c. points W and Y
b. points V and X d. points X and Z

37. Which of the following is an example of a mechanical wave? a. radio wave b. water wave c. light wave d. microwave

38. A large spring is stretched horizontally between two people. One person wiggles the spring up and down at one end. The up‑and‑down vibration then moves along the spring to the other person. Which of the following types of wave is created in the spring?
a. pressure wave
b. transverse wave
c. longitudinal wave
d. nonmechanical wave

39. A string is tied on a spring. Two students then stretch out the spring, as shown below.

In which of the following ways does the string move when the students generate a longitudinal wave in the spring?

a. c.

b. d.

40. Electromagnetic waves of various frequencies reach Earth from distant parts of the universe. Which of the following can be inferred from this?
a. The wavelengths must be very short.
b. A single material must fill all of space.
c. These waves can travel without a medium.
d. The speed of these waves is 300,000,000 m/s.

41. A student hears the sound of a bell. Which of the following carries the sound of the bell to the student?
a. electrical currents
b. magnetic signals
c. radio waves
d. vibrating air

42. Which of the following statements best describes an electromagnetic wave with a long wavelength?
a. It has a low frequency and can travel in a vacuum.
b. It has a high frequency and can travel in a vacuum.
c. It has a low frequency and can only travel in a medium.
d. It has a high frequency and can only travel in a medium.

43. The pictures below show four different bells made of the same material.

Which of the following bells should have the lowest pitch? a. bell 1 b. bell 2 c. bell 3 d. bell 4

44. White light can be separated into the various colors of the visible spectrum. Which of the following is form due to this phenomenon? a. transverse light b. rainbow c. shadow d. photoelectric light

45. Which of the following is an example of heat transfer by conduction?
a. sunlight heating a floor
b. an electric stove heating an iron pan
c. an air conditioning unit that help cools a room
d. a wood stove heating nearby objects through electromagnetic waves

Quarter 4
46. Which of the following best describes latitudes?
a. Latitude lines are parallel, that is they are the same distance apart
b. Measurement of distance in degrees north and south of the equator.
c. Measurement of distance in degrees east or west of the prime meridian.
d. The lines to the right of the primer meridian give locations east, in the eastern hemisphere.

47. What is the location of the Philippines in terms of latitude and longitude?
a. 13° N and 122° E c. 30° N and 110° E
b. 25° N and 150° E d. 45° N and 150° E

48. Which of the following is largest body of water located east of the Philippines?
a. Atlantic Ocean b. Celebes Sea c. China Sea d. Pacific Ocean

49. How far a location or a country is from the equator effects ____________.
a. the climate in the area c. the date and calendar year in the area
b. time zone in the place d. when it is day and when it is night

50. Which of these diagrams shows the most likely pattern of air currents above a coastal region in the late afternoon on a hot, sunny day?

a. c.

b. d.

51. In terms of the controls of weather and climate, latitude primary affects a. atmospheric circulation c. precipitation b. humidity d. temperature

52. Earth is not the only planet that exhibits weather conditions. What is required for a planet to support weather systems? a. atmosphere b. existing life c. moon d. surface

53. How does atmospheric circulation influence climate?
a. by producing ocean currents
b. by distributing air that causes wind
c. by producing winds that cause ocean currents
d. by producing winds that distribute heat and moisture

54. This is also known as the southwest monsoon. This natural phenomenon starts during the summer months in the northern hemisphere, when the Asiatic continent becomes warmer than the surrounding seas.
a.Hanging Amihan c. inter-tropical convergence zone
b. Hanging Habagat d. trade winds

55. What causes the seasons on the Earth to change?
a. Gravitational Force c. Tilt of the Earth
b. Land forms of the Earth d. Size of the Earth

56. When the Sun is directly above the equator and day end night are of the same length. Which of the phenomenon follow will occur?
a. Eclipse b. Equinox c. Solstice d. Tides

57. The warming of the Earth’s atmosphere due to the building up of gases such as carbon dioxide and methane.
a. Aurora Borealis c. Climate Change
b. Greenhouse Effect d. Solar Strong

58. Why does the air temperature rise in the summer?
a. We are closer to the sun.
b. The tilt of the Earth decreases during summer.
c. The amount of daytime is reduced in the summer.
d. The sun's rays are more direct and days are longer.

59. In order for a lunar or solar eclipse to occur what needs to happen?
a. The Sun and Earth need to be near each other
b. The Sun, Moon and Earth are in a straight line
c. The Sun, Moon and Earth form a triangle
d. The Sun and Moon are really far apart

60. Which of the following pictures shows the appearance of the Moon when a solar eclipse occurs?

a. b. c. d.