LS2 SCIENCE Flashcards
1
Q
- Which of the following CANNOT be considered a progress in electronics?
(A) from air mail to e-mail
(B) from radio to television
(C) from newspaper to internet
(D) from pencil to manual typewriter
A
D) from pencil to manual typewriter
2
Q
- Roger started smoking at the age of 14. One day, he experienced difficulty in breathing.
According to his laboratory results, this is due to over-inflation of tiny air sacs in the lungs.
His respiratory condition is called
(A) asthma
(B) colds
(C) emphysema
(D) pneumonia
A
(D) pneumonia
3
Q
- Joseph, a high school student, has joined a fraternity known to be using prohibited drugs.
Since then, he has incurred frequent absences, shown lack of interest in school, and has
been observed with poor hygiene. If there will be more students like Joseph, which of the
following might NOT occur?
(A) healthy community
(B) interpersonal conflict
(C) physical violence
(D) school drop-out
A
(A) healthy community
4
Q
- Which of the following statements is true about the changes in the appearance of the moon?
(A) The moon is getting closer to the earth.
(B) The moon is increasing speed as it rotates.
(C) The moon is physically changing in size and shape as it rotates around the Earth.
(D) The moon is reflecting different amounts of light due to the alignment of the Sun
and Earth.
A
(D) The moon is reflecting different amounts of light due to the alignment of the Sun
and Earth.
5
Q
- The farm of Barrio Masaya was infested with rats which fed on their crop of corn. Also, many
farmers have been catching snakes to sell their meat in the restaurants. Which of the
situations will likely happen in the corn and rat populations over time?
(A) Both populations will increase.
(B) Both populations will stay the same.
(C) The rat population will increase while corn population will decrease.
(D) Corn populations will increase while the rat population will
decrease.
A
(C) The rat population will increase while corn population will decrease.
6
Q
- PAGASA raised Public Storm Warning Signal No. 1 over the province. Which of the following
is NOT one of the possible effects of this storm?
(A) Tsunami may be generated.
(B) Some plants may be uprooted.
(C) Rice and corn crops may be affected.
(D) Roofs made of nipa may be damaged.
A
(B) Some plants may be uprooted.
7
Q
- Priscilla has a garment shop. Every day she collects a lot of fabric fragments. What is the best
thing she could do with them, to help in the proper waste management of the community?
(A) Burn them.
(B) Make cleaning rags out of them.
(C) Use them as compost for the garden.
(D) Collect them and give it to the garbage collector.
A
(B) Make cleaning rags out of them.
8
Q
- A community living in a coastal area is expected to get their resources through ___________.
(A) mining
(B) hunting
(C) fishing
(D) farming
A
(C) fishing
9
Q
- Substance abuse involving our youth is one of the most rampant problems faced by the
government today. Which of the following is the best strategy for the early prevention of this
problem?
(A) Integrate drug education in the curriculum.
(B) Conduct a barangay drug clearing operation.
(C) Perform an unannounced drug testing to schools.
(D) Increase awareness regarding the matter through media.
A
(A) Integrate drug education in the curriculum.
10
Q
- Using the information from the table above, how can Elisa prevent her family members
from being victim of foodborne illnesses?
(A) Cook food in advance for a weekly menu.
(B) Cook food according to proper directions.
(C) Set the freezer at lowest on the dial to save electricity.
(D) Allow a sick family member to handle the food service.
A
(B) Cook food according to proper directions.
11
Q
Although sex education is already integrated in the curriculum, early pregnancy is one of the
major reasons for the increase of drop-out rate in schools. What is the best alternative way
to minimize, if not solve this problem?
(A) Promote family planning.
(B) Separate boys from girls in school.
(C) Regulate sex-related posting in social media.
(D) Strengthen values education in the curriculum.
A
(D) Strengthen values education in the curriculum.
12
Q
- Mr. Isidro is planning to build a new house for his family. For the construction of the iron
fence, Mr. Isidro must make sure that the constructor will do the following EXCEPT
(A) use galvanized metal
(B) apply protective coating
(C) limit the number of bars
(D) consider the distance from the ground
A
(C) limit the number of bars
13
Q
- The Malampaya gas field is a deep-water power reservoir in Palawan, supplying three
powerplants in the country. It delivers up to 20% of the country’s electricity requirements,
using indigenous sources of natural gas. In 2017 the Malampaya gas field was shut down
to improve its facility. What might happen to the energy supply of the country if Malampaya
runs out of gas?
(A) There may be an increase in the cost of gas.
(B) There will be a shortage of gas supply.
(C) It may be necessary to import gas.
(D) All of the above
A
(D) All of the above
14
Q
- The population of the Philippines is projected to soar to 117,260,000 by 2024. An effort to
curb this exponential growth of population is RA 10354 informally known as Reproductive
Health Law. A NEGATIVE result of overpopulation in the country would be
(A) increased biodiversity
(B) minimized carrying capacity
(C) satisfied basic human needs
(D) overexploited natural resources
A
D
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33
33. Electrical energy and electrical power are two related quantities. Given the table below, how
will you compare electrical energy to electrical power?
Quantity Equation Unit of Measure
Electrical Energy E = Pt Watt
Electrical Power P = E / t Watt/hour
(A) The unit for electrical energy is watt while for electrical power it is watt/hour.
(B) Given the same quantity of time, electrical energy is inversely proportional to
power.
(C) Electrical power is the product of energy and time while electrical energy is the
power over time.
(D) Electrical energy is the rate at which work is done while electrical power is the
capacity to do work.
(D) Electrical energy is the rate at which work is done while electrical power is the
capacity to do work.
34
34. When light passes through the prism, it separates into different colors. Based on the table
below, which of the following shows the correct arrangement of colors based on increasing
wavelength?
COLOR WAVELENGTH
I. Red 620-750
II. Blue 450-495
III. Green 495-570
IV. Violet 380-450
V. Orange 590-620
VI. Yellow 570-590
(A) I, V, VI, III, II, IV
(B) IV, II, III, VI, V, I
(C) I, III, II, V, IV, VI
(D) V, VI, III, IV, I, I
(B) IV, II, III, VI, V, I
35
35. The different stages in fertilization are seen above. Which of the following are the correct
sequence in the process of fertilization?
(A) I - II - III - IV
(B) II - III - IV - I
(C) III - IV - I - II
(D) IV - I - II - III
(A) I - II - III - IV
36
36. Based from the data presented above, which graph correctly illustrates the motion of the
vehicle?
B
37
37. Which of the following set/s of statements describe the properties of elements in a periodic
table?
(A) Set A
(B) Set B
(C) Both A and B
(D) Neither A nor B
(A) Set A
38
38. Science makes our work easier and contributes a lot to our daily living. The development of
gadgets, improvement of transportation, invention of ATMs is some of the contributions of
science in the field of
(A) education
(B) health
(C) psychology
(D) technology
(D) technology
39
39. All animals are classified into two major groups: vertebrates and invertebrates. Which of the
following best describes vertebrates?
(A) Animals that have a backbone inside their body.
(B) Animals that have the largest number in the animal kingdom.
(C) Animals that are mostly found in water and have lungs for breathing.
(D) Animals that have long tube-like bodies that are divided into segments.
(A) Animals that have a backbone inside their body.
40
40. There are two major processes in respiration: external respiration and internal respiration.
How does external respiration differ from internal respiration in terms of organs involved?
(A) External: Blood; Internal: Nerves
(B) External: Heart; Internal: Brain
(C) External: Lungs; Internal: Cell
(D) External: Muscles; Internal: Bones
(C) External: Lungs; Internal: Cell
41
41. Which of the following situations shows progress in Science and Technology?
I. A mother with leukemia undergoing stem cell transplant for treatment.
II. A farmer using highly insect resistant crops in planting.
III. A student using video presentation in his report
IV. A scientist using a microscope in a laboratory test.
(A) I and II only
(B) II and III only
(C) I, II and III only
(D) II, III and IV only
(C) I, II and III only
42
42. A science teacher asked her students to write on the board all the diseases that they know.
She then rewrote their answers into two groups, as shown above. What will the students infer
as the basis for the grouping?
(A) Group 1 are children’s diseases while Group 2 are adults’ diseases.
(B) Group 1 are inherited diseases while Group 2 are lifestyle diseases.
(C) Group 1 are air-borne diseases while Group 2 are food-borne diseases.
(D) Group 1 are infectious diseases while Group 2 are noninfectious diseases.
Group 1 Group 2
Colds Arthritis
Hepatitis Cancer
Influenza Diabetes
Measles Osteoporosis
Tuberculosis Stroke
(D) Group 1 are infectious diseases while Group 2 are noninfectious diseases.
43
43. Maria experienced almost a week of cough so she decided to buy an over-the-
counter medicine. What expectorant medicine will she buy?
(A) Medicine A, which was advised by her friend.
(B) Medicine B, which was prescribed by her doctor.
(C) Medicine C, which she saw in a commercial.
(D) Medicine D, which was suggested in the pharmacy.
(D) Medicine D, which was suggested in the pharmacy.
44
44. An earthquake struck Tulunan, Cotabato around 7:34 pm on October 16, 2019. This
resulted in seven casualties and more than 200 injured. The earthquake’s reported
magnitude of 6.3 was based on the __________________________.
(A) Modified Mercalli Scale
(B) Richter Scale
(C) Saffir-Simpson Scale
(D) Vernier Scale
(B) Richter Scale
45
45. Dengue fever is a mosquito-borne tropical disease caused by dengue virus. Philippines was
recorded with the highest number of cases and confirmed deaths in Southeast Asia. Based
on the graph shown above, which age group among the females has the highest confirmed
cases of dengue?
(A) 5 - 9
(B) 10 - 14
(C) 15 - 19
(D) 20 - 24
(B) 10 - 14
46
46. Based on the nutrition facts of a noodle product shown above, what part indicates the
micronutrient content of the product?
(A) I
(B) II
(C) III
(D) IV
(C) IIl
47
47. Based on the food pyramid above, what should be the guide for a person’s food intake?
(A) Eat food rich in fats for supper.
(B) Eat food according to one’s appetite.
(C) Eat less protein-rich food than fruits and vegetables.
(D) Eat more vegetables and fruits that are rich in carbohydrates.
(D) Eat more vegetables and fruits that are rich in carbohydrates.
48
48. The African Swine Flu (ASF) is often introduced into a herd of pigs by the feeding of
uncooked/ undercooked contaminated pork products and can also be transmitted by ticks
and blood-sucking insects. The disease is mainly caused by
(A) Ebola virus from fruit bats
(B) bacteria from contaminated food
(C) roundworms from infected animal feces
(D) large virus harbored in domestic or wild pigs
(D) large virus harbored in domestic or wild pigs
49
49. Which of the following describes the valuable contribution of science in the improvement of
the quality of life?
(A) It helps develop biological warfare.
(B) It explains the different laws of nature.
(C) It promotes advancement in all areas of life.
(D) It gives explanation to the different scientific beliefs.
(C) It promotes advancement in all areas of life.
50
50. According to the Intergovernmental Panel on Climate Change, scientific evidence for warming
of the climate system is certain. Which of the following are the pieces of evidence of rapid
climate change?
I. Warming of oceans
II. Rising of sea levels
III. Declining arctic sea ice
IV. Decreasing of global temperature
(A) I, II, and III only
(B) I, II, and IV only
(C) I, III, and IV only
(D) II, III, and IV only
(A) I, II, and III only
51
51. Vehicles A and B are travelling at the same speed down the mountain, with the same degree
of slope. Which vehicle(s) will travel farther, assuming that they have shifted into normal
gear?
(A) Vehicle A
(B) Vehicle B
(C) Vehicles A and B will travel with the same distance.
(D) None of the above
(B) Vehicle B
52
52. The presence of umbra and penumbra during solar eclipse is one of the evidences that light
travels in a straight line. This statement is true because of the
(A) reflection made by the sun to the moon
(B) scattered light on the rough surface of the moon
(C) refraction of sun’s light in the water surface of the earth
(D) shadow produced due to the alignment of the sun, moon and earth
(D) shadow produced due to the alignment of the sun, moon and earth
53
53. Biotechnology is the use of biology to create useful products that can help solve human
problems. An example is the development of highly insect-resistant crops for planting.
Which of the following states the importance of biotechnology?
(A) It helps improve human life.
(B) It provides the basic needs of humans.
(C) It complicates the human way of living.
(D) It can provide the best solution to human problems.
(A) It helps improve human life.
54
54. Based on the illustration above, what possible device might be invented after three (3)
years?
(A) All-in-One audio with built-in cellphone, printer and projector
(B) All-in-One cellphone with built-in printer, projector and audio
(C) All-in-One printer with built-in cellphone, projector and audio
(D) All-in-One projector with built-in cellphone, printer and audio
(B) All-in-One cellphone with built-in printer, projector and audio
