Useful for STEM SHS Students

1. General Science Review
Session
JUNAR S. DAPAPAC
SHST-II

3. a. Experiment provide information that will always
support predictions.
b. Accurate observations are necessary to organize
problems.
c. Predictions do not point the way to possible
solutions to problems.
d. Graphs are not useful in interpreting data
1. Which of the following statements does a scientist
always consider?

4. Answer: A
• Experimentation is the most important step in scientific method. The
results of the experiment or the information provided by the
experiment will answer the problem and will prove or disprove the
hypothesis.

5. a. III, II, I ,IV
b. III, IV, II, I
c. III, I, II, IV
d. III, II, IV, I
2. Arrange the following steps in the most logical order
of scientific investigations.
I. Formulate the hypothesis
II. Perform the experiment
III. State the problem
IV. Draw the generalization

6. Answer; C
• In scientific method, the logical steps in solving problem start with the
problem, followed by hypothesis, then experimentation and
generalization. Generalization includes conclusion and application.

7. a. 0 m
b. 3 m
c. 6 m
d. 9 m
3. A student walks from home to school 3 blocks away
and then returns home for lunch. After lunch, he goes
back to school. His total displacement ________.

8. Answer: B
• Displacement is a vector, so, the direction is also considered. When
the students returns home, the 3 blocks displacement is cancelled
and going back to school will give 3 blocks.

9. a. The man travelled a longer time distance than
the dog
b. the dog used a longer time to finish the race.
c. the man used a shorter time to finish the race
d. the man and the dog travelled the same
distance at the same time.
4. In the race between the man and the dog, the man appeared
to move faster than the dog and finished the race ahead. How
will you describe the motion of the two during race?

10. Answer: C
• The speed of a body depends on the two factors: distance and time.
The longer the distance travelled in a shorter time interval will result
in greater speed. Since it is a race, the man and the dog travelled the
same distance. The man used a shorter time and so, he travelled
faster and finished the race ahead.

11. a. There are no forces acting on the block.
b. The sum of the forces acting on the block is zero
c. The block is in uniform in motion
d. The block is accelerated
5. Which of the following is true when a block of wood
lays at rest on top of the table.

12. Answer: B
• For a body to be at rest, the sum of the forces acting on a certain
body should be zero.

13. a. Surface tension
b. Capillarity
c. Buoyant force
d. Liquid pressure
6. A razor blade can float on the surface of water
because of _______.

14. Answer: A
• Surface tension is a property of liquids arising, from the molecular
cohesive forces at or near the surface. As a result, the surface tends
to contract, resembling a stretched elastic membrane. That’s why a
razor blade can float in water despite its greater density than water.
• Capillary rise or capillarity is a phenomenon in which liquid
spontaneously rises or falls in a narrow space such as a thin tube or in
the voids of a porous material.
• Liquid pressure is the increase in pressure at increasing depths in a
liquid.

15. a. The greatest potential energy is at the highest
end of the inclined plane.
b. The greatest kinetic energy is at the lowest end
of the inclined plane
c. Kinetic energy transformed potential energy as
it rolls down.
d. Potential energy is transformed to kinetic
energy as it rolls down.
7. A ball rolls down an inclined plane. Which of the
following is not correct to describe the potential and
kinetic energy?

16. Answer: C
• A,B, and D are all correct, while C is not. The ball starts from the
highest point; thus, the PE is the greatest at that point. As it rolls
downward, the ball is accelerated and so the kinetic energy increases.
Therefore, the transformation of energy is from potential to kinetic.

17. a. They have supersonic eyes in the dark
b. They project fluorescence light in the dark.
c. They have a sonar at the tip of the nose that
emits sound waves.
d. They are made invisible at the dark.
8. Bats, which are nocturnal, can fly swiftly in the dark
without bumping to a barriers. This is because _____.

18. Answer: C
• The sonar at the tip of the nose of the bat emit sound waves and
these waves after hitting the barrier in front will be reflected and
goes back to the sonar to tell that there is a barrier in front.

19. a. Can be reflected
b. Both travel in a medium
c. Both have similar wavelengths
d. Both travel as a longitudinal wave.
9. Which of the following statement is true for both
sound and light waves?

20. Answer: A
• Reflection is a general property of wave. Since sound and light are
both waves, both can be reflected. Sound cannot travel without
medium. Sound and light have different wavelength. Sound is
longitudinal, while light is transverse.

21. a. Concave
b. Convex
c. Plane
d. Irregular
10. What kind of mirror is best used as side mirrors in
cars?

22. Answer: B
• The image by a convex mirror is always upright, virtual and located
near the aperture of the mirror whether the vehicles following the car
is near or far. The image formed by the concave mirror is very
deceiving because there are cases in which the image formed is
inverted or even no image is formed. The image formed by plane
mirror is also deceiving because the size and distance of the image
are always the same as the size and the distance of the object.

23. a. Gains proton
b. Gains electron
c. Loses proton
d. Loses electron
11. An object become positively charge if it _______.

24. Answer: D
• An object becomes positively charge when it loses electrons, so that
the number of protons is greater than the number of electrons. The
electrons are the only ones that can transfer to or from the atoms,
not the proton.

25. a. 2
b. 8
c. 16
d. 32
12. What is the maximum number of electrons that can
be accommodated in n=4?

26. Answer: D
• The maximum number of electrons that a certain orbit can
accommodate is express in the formula N= 2n^2, where N is the
number of electrons and n is the number of orbit. If n=4, then
N=2X4^2= 32

27. a. Alkali metal
b. Halogen
c. Inert gas
d. Carbon
13. If element X has an atomic configuration of 1S^2
2S^2 2P^2, what family in the periodic table does this
element belong?

28. Answer: D
• Since the outer atomic configuration of element X is 2P^2, it is located
in group IVA, the carbon family.

29. a. Good conductor
b. Brittleness
c. Malleability
d. Ductility
14. The following are characteristics of metals, EXCEPT
________.

30. Answer: B
Brittleness is the ability of a certain material to be broken easily.
Obviously, it is not a characteristics of a metal. Three other choices are
good conductor, malleability, and ductility are characteristics of metals.

31. a. Alloy, air, sugar solution
b. rainwater, petroleum, gravel and sand
c. Salt solution, sugar, sea water
d. Water, air, oil
15. In the given list of mixture, the one which is
considered homogenous is _______.

32. Answer: A
• Homogenous mixture is made up of only one phase and the
composition is the same throughout the mixture. In the given list,
alloy, air and sugar solution are homogenous mixture. Although
choice B is composed of all mixtures, gravel and sand are
heterogenous, Choices C and D have compounds in their list, sugar
and water respectively.

33. a. ABCD
b. BACD
c. BCAD
d. DACB
16. Mineral B can scratch D. Mineral A can scratch D
but A can scratched by C. D can be scratched by C but B
can scratch C. Which of the following is the correct
order from hard to soft?

34. Answer: C
• Hardness is the ability of a mineral to scratch another mineral.

35. a. Igneous.
b. Sedimentary
c. Metamorphic
d. Volcanic tuff
17. While digging the ground, a man found a well-
preserved fossil of an organism in a broken rock. This
rock is most likely ________.

36. Answer: B
1. Igneous rock- Forms as magma cools and crystalizes
2. Sedimentary- Layer of rock fragments that have been cemented
together and hardened for years.
3. Metamorphic- Rocks undergo a slow process of change due to heat,
pressure, and chemical action.

37. a. Shield cone
b. Composite cone
c. Cinder cone
d. Lava cone
18. A type of volcano that is described to have a narrow
base and a steeper slope is a _______.

38. Answer C
• There are three types of
volcanoes according to
cones. The shield cone has
broad base and gentle
slope. The composite cone
is one which is nearly
perfect, while the cinder
cone has narrow base and
steeper slope.

39. a. Amount of rainfall
b. Strength of the accompanying winds
c. Amount of rainfall and strength of accompanying
wind.
d. Origin of formation
19. Tropical disturbances are classified as tropical
depression, tropical storm or typhoon. This
classifications is based on the ________.

40. Answer: B
• PAGASA classifies the weather disturbances according to the strength
of the accompanying winds. The amount of rainfall is not the basis of
classifying weather disturbances.

41. a. Extinction of rare animals
b. Temperature warming and rise of sea level
c. Toxic wastes from industrialized countries are
disposed to poorer countries
d. Desertification of verdant regions.
20. Social and environmental injustices are
interconnected, as exemplified by which of the
following?

42. Answer: C
• Truly, social and environmental injustices are interconnected and this
usually happens globally. Most of the problems encountered is
disposal of wastes. An example of this is the issue of the garbage from
Canada, which is dumped in the Philippines.

43. a. Philippine Clean Air Act
b. Environmental Security Act
c. Anti-pollution Act
d. Greenpeace Act
21. Which of the following law requires to install anti-
pollution devices and bans the use of incinerators?

44. Answer: A
• The Philippine Clean Air Act of 1999 simply known as Clean Air Act,
adopts and promulgates policies, regulations, etc. in order to
maintain good quality of air that protects human health and welfare.
This act requires industries to install pollution control devices and
bans of incinerators.

45. a. Environmental protection.
b. Energy conservation.
c. Ecological destruction.
d. Sustainable development
22. The Kyoto Protocol requires to reduce greenhouse
effect in the environment. This practice advocate
______.

46. Answer: A
• The Kyoto Protocol operationalizes the United Nations Framework
Convention on Climate Change by committing industrialized countries
and economies in transition to limit and reduce greenhouse gases
(GHG) emissions in accordance with agreed individual targets.
• The advocacy of Kyoto Protocol is primarily the environment
protection.

47. a. Solar
b. Geothermal
c. Wind
d. Hydroelectric powerplant
23. Of the following listed below, which one is
considered as the most disadvantageous source of
energy since it gives detrimental effect on the
population’s food supply?

48. Answer: B
• Geothermal power plant affects the vegetation in the nearby area,
that’s why the food supply is also affected.

49. I. Skeletal II. Nervous III. Muscular IV. Digestive
a. 1 and 2
b. 2 and 3
c. 1, 2, and 3
d. 1, 2, 3, and 4
24. What organ systems are involved when a chicken
flees upon sensing the presence of a snake?

50. Answer: C
• The chicken flees because it is afraid of the snake. It therefore
involves the nervous system. In fleeing, the chicken uses its
movement, so it involves the skeletal and the muscular system.

51. a. Digestive, Respiratory, and Integumentary
b. Digestive, Circulatory, and Excretory
c. Digestive, Respiratory and Nervous
d. Digestive, Muscular and integumentary
25. Removal of wastes is essential in maintaining body
functions. Which group of systems helps the body
remove wastes?

52. Answer: A
• The digestive system removes waste after digestion of food, the
respiratory system, releases carbon dioxide while integumentary
which involves the skin excretes sweat through pores of the skin.