. Which of
the following statements best describes a hypothetical element with an electron
configuration of 1s22s22p63s23p5?
a. The
hypothetical element has an atomic number of 11.
b. The
hypothetical element is a member of Group V, otherwise called the Nitrogen
Group.
c. The
hypothetical element is in the fifth position in the p-block, along the third
period of the periodic table.
d. The
hypothetical element is located at the third position of the p-block, along the
fifth period of the periodic table.
2. Despite
the observed diversity among organisms, they
are all made from the same set of biomolecules composed of monomeric units
except:
a.
Proteins
b.
Carbohydrates
c. Nucleic
Acids
d. Lipids
and Fats
3. What
will be formed when radium isotope, with 88 protons and 138 neutrons undergoes
alpha decay?
a. Radon
Atom (Rn222) with 86 Protons
b.
Francium Atom (Fr222) with 87 Protons
c.
Actinium Atom (Ac222) with 89 Protons
d. Thorium
Atom (Th232) with 90 Protons
4. Which
of the following examples best illustrates application of Boyle’s Law?
a. A tire
becomes harder as more air is pumped into it.
b. A
sealed aerosol can explodes when thrown into a fire.
c. A
balloon expands and bursts when exposed to direct sunlight.
d. A scuba
divers stops at certain depths as he ascends to the ocean’s surface.
5. Three
liquids A, B, C were studied in a laboratory. Liquid A was found to float over
B and C. It was also found that liquid A flows fastest among the three. What
can be said about liquid A?
a. Densest
and most viscous
b. Densest
and least viscous
c. Least
dense and most viscous
d. Least
dense and least viscous
6. Which
of the following statements represents a physical change?
a. An
antacid tablet forms bubbles when dissolved in water.
b. A
flashlight beam slowly gets dimmer and finally dies out over time.
c. The
lawn grows thicker every day because fertilizers were added into the soil.
d. Frozen
mango juice melted when left standing at room temperature for 30 minutes.
7. Which
of the following best explains why farmers burn rice straw and hull during
seasons of harvest?
a. Burning
rice hulls and straws produce compounds that act as repellant for pests which
may damage plantation.
b. The
smoke produced by burning rice hulls and straws stimulate growth and fruit
bearing of trees.
c. Rice
hulls and straws are burned so that more spaces will be available for planting
next set of crops.
d. Ash
from burnt rice hulls and straws are rich in compounds that could neutralize
acidic soil so that more crops will grow
8. Acid
rain occurs when ____________.
8. Acid
rain occurs when _________.
a. carbon
dioxide combines with water in the atmosphere.
b.
phosphorus-rich water in lakes evaporates to form phosphoric acid.
c. sulfur
released in burning fossil fuels combines with water in the atmosphere.
d. excess
hydrogen is released into the atmosphere to produce acids.
9. Why is
it difficult to integrate nitrogen gas from the atmosphere into the nitrogen
cycle of the biosphere?
a.
Nitrogen is very abundant in the atmosphere
b. Living
organisms quickly absorb nitrogen gas
c. Oceans
quickly absorb nitrogen gas
d. Few
organisms can directly utilize atmospheric nitrogen
10. Which
of the following sentences about greenhouse effect is INCORRECT?
a.
Greenhouse gases trap heat in the atmosphere which are returned to the earth’s
surface.
b.
Greenhouse effect is important in maintaining the temperature of the earth.
c.
Greenhouse effect is due to gases that absorb the green region of light from
the sun.
d.
Greenhouse effect increases the overall surface temperature of the earth.
11. When a
gardener propagates a plant by taking cuttings, he plants his cutting in a
well-watered soil in a plant pot. What is the most likely reason why he may
then cover the plant and pot with a lightly perforated polythene bag?
a. To
reduce the water demand of the cutting.
b. To decrease
the rate of gaseous exchange by the plant.
c. To
reduce the chance of attack by pests.
d. To
protect the plant from cold weather.
12. It is
a common observation that mushrooms thrive few days after lightning strikes.
Which among the following biogeochemical cycles is involved in this process?
a.
Nitrogen cycle
b.
Carbon-Oxygen cycle
c.
Phosphorus cycle
d. Sulfur
cycle
13. Which
of the following factors contribute to an increase in human population?
I. Immigration II.
Emigration
III. Natality IV. Mortality
a. III and
IV
b. II and
III
c. I only
d. I and
III
14. Shown
below is a simple food web in a grassy community. The arrow symbol means eaten
by. What would happen if all snakes are
killed?
Grass>Grasshopper>Frog>Snake
Bird>Snake
a. Grass
population would increase.
b.
Grasshopper population would increase.
c. Bird
and frog populations would increase.
d.
Grasshopper and bird populations would increase.
15. Which
of the following shows mechanical weathering of rocks?
a. formation
of caverns
b. acids
dissolves rocks
c.
freezing water between rock particles
d. iron in
rocks combine with oxygen
16. PAGASA
announces the approach of the seasonal winds. The familiar names used are
Amihan and Habagat, internationally known as ________ and ________
respectively.
a.
Northeast and southwest
b. Trade
wind and easterlies
c.
Southwest and northeast
d.
Westerlies and easterlies
17. Fog is
a cloud with its base at or very near the ground. The formation of fog
generally occurs after the ground has lost heat by:
a.
Evaporation
b.
Convection
c.
Conduction
d.
Radiation
18. Why do
we see the sun rise in the east?
a. The
earth revolves eastward.
b. The
earth rotates from west to east.
c. We are
located in the 20th meridian.
d. On the
globe, we are located in the east.
19. If a
voltage of 100 volts produces a current of 5 amperes in an electrical device,
what is the resistance?
a. 95 Ohms
b. 20 Ohms
c. 105
Ohms
d. 500
Ohms
20. Which
of the following best differentiates an earthquake's intensity from its
magnitude?
a.
Intensity describes 'the depth from which the earthquake originated’ while
magnitude refers to ‘the energy of the earthquake’.
b.
Intensity cannot be measured while magnitude can be measured using a
seismograph.
c.
Intensity refers to the strength of the quake while magnitude refers to the
degree of destruction it caused at the epicenter.
d.
Intensity is a measure of how much damage an earthquake cause at the surface
while magnitude is the strength of the quake.
21.
Comparing the speed of sound in liquids, gases, and solids, the speed of sound
is usually lowest in ____ and highest in ____.
a. solids,
gases
b. gases,
liquids
c.
liquids, solids
d. gases,
solids
22. Which
has a greater density, a lake full of water or a cupful of water?
a. The cup
full of water
b. The
lake full of water
c. Not
enough information
d. They
have the same density
23. A
stainless steel spoon feels colder than a plastic spoon because stainless steel
a. absorbs
less heat from the hand than plastic does
b. is
really colder than plastic
c. has a
lower temperature than plastic
d.
conducts heat away from the hand faster than plastic does
24. Why is
it NOT advisable to repeatedly open the door of a refrigerator?
a. It will
loosen the hinges of the refrigerator's door
b. Leads
to wastage in electrical energy.
c.
Repeated opening introduces bacteria in to the refrigerator.
d. The
warm air outside lowers the temperature inside thus making the refrigeration
less-efficient.
25. What
kind of mirror is used in cars to give the driver a wider area and smaller
image of the traffic behind him/her?
a. Double
concave
b. Convex
c. Plane
d. Concave
26. Why do
we hear thunder some seconds after seeing lightning?
a. Light
appears brighter in the sky.
b. Light
travels faster than sound.
c. Sound
travels 1.331 m/s
d. Sound
is released later actually
27. Water
has a higher specific heat than iron. What does this mean?
a. Water
is hotter than iron
b. Water
heats more rapidly than iron
c. Water
is more dense than iron
d. Water
heats more slowly than iron
28. If a
colorblind man marries a woman who has normal vision and no history of the
disease, it is most probable that all of their :
a.
daughters will be carriers
b.
daughters will be colorblind
c. sons
will be carriers
d. sons
will be colorblind
29. Albino
corn seedlings may grow several inches tall. However, they will eventually die,
primarily because
a. direct
sunlight will destroy their cells
b. they
lack adequate root system
c. they
cannot produce their own food
d. they
cannot obtain carbon dioxide
30. Mimosa
pudica, locally known as Makahiya is called as such because its leaflets tend
to close when touched. This organismal response to a given stimuli is called:
a.
Hydrotropism
b.Thigmotropism
c.
Geotropism
d.
Phototropism
Answers:
1C
2D
3A
4D
5D
6D
7D
8C
9D
10C
11A
12A
13D
14C
15C
16A
17D
18B
19B
20D
21D
22D
23D
24B
25B
26B
27D
28A
29C
30B