BALASABAS, THRECIA GAILE B..docx.pdf

Republic of the Philippines
SURIGAO DEL SUR STATE UNIVERSITY
Tandag City- Main Campus
COLLEGE OF TEACHER EDUCATION
Name: Threcia Gaile B. Balasabas Year & Section: 3rd
Year BSED- Science
Instructor: Dr. Nemesio Loayon Time & Day: 5:00-6:00pm/ Wednesday
Multiple Choice: Encircle the letter of the correct answer.
Earth Science (1-20 items)
1. Global climate change is being attributed to the atmospheric increase in what two
gases produced by human activities?
a. oxygen and hydrogen
b. ozone and methane
c. methane and carbon dioxide
d. nitrous oxide and sulfur dioxide
Answer: c. methane and carbon dioxide
Explanation: Methane and carbon dioxide are the two main gases produced by
human activities influencing the climate and the earth's temperature.
2. What is landform?
a. Mountains
b. Deserts
c. Valleys
d. All of the above
Answer: d. All of the above
Explanation: Landform means refers to the Earth's surface that is part of the terrain.
Mountains, deserts and valleys are some major types of landforms.
3. These types of rocks are formed when there is high pressure and high
temperature
a. Metamorphic rock
b. Granite
c. Igneous rock
d. Sedimentary rock
Answer: a. Metamorphic rock
Explanation: Metamorphic rock are subjected by intense heat or pressure while
forming. Both sedimentary and igneous rocks can be changed into metamorphic
rock.
4. This word comes from the water cycle and means to change from a liquid form to
a gas form?
a. Deposition c. Sediments
b. Evaporation d. Precipitation
Answer: b. Evaporation
Explanation: Evaporation happens when a liquid turns into a gas or vapor. It is one
of the three main steps in the global water cycle.

5. The convergence of two CONTINENTAL plates will produce ___.
a. island arcs c. rift valleys
b. folded mountains d. trenches
Answer: b. folded mountains
Explanation: Fold mountains are created where two or more of Earth's tectonic
plates are pushed or produce together. The lifting and folding of the rock layers on
the Earth's crust leading to the formation of fold mountains.
6. To what biome do the Philippines belong to?
a. Tropical rainforest c. Dipterocarp Forest
b. Tundra d. Grassland
Answer: a. Tropical rainforest
Explanation: Tropical Rainforest is a forest occurring in tropical areas of heavy rainfall.
It is abundant with many species of wildlife and vegetation. Philippines is tropical land
with a tropical rainforest climate that rich with biodiversity’s and mountainous terrain.
7. To earth scientist, the most important features on the map are the landforms that
shape the earth’s surface and are shown in?
a. Hydrographic map
b. Geologic map
c. Political map
d. Topographic map
Answer: d. Topographic map
Explanation: A topographic map is a map that indicates the features of the land's
surface, such as mountains, hills, and valleys.
8. What causes high and low tides?
a. Earth’s rotation on its axis c. Moon’s gravitational pull
b. Sun’s solar energy d. Earth’s gravitational pull
Answer: c. Moon’s gravitational pull
Explanation: Moon’s gravitational pull is strong enough to cause high and low tides.
9. The part of the atmosphere that filters the ultraviolet rays of the sun.
a. Stratosphere c. Ozone layer
b. Troposphere d. Ionosphere
Answer: c. Ozone layer
Explanation: The ozone layer filters out most of the sun's harmful UV radiation and is
therefore crucial to life on Earth.

10. It is the boundary at which the advancing warm air is replacing colder air at the
surface.
a. Warm front c. Cold front
b. Stationary front d. Occluded front
Answer: a. Warm front
Explanation: A warm front is the boundary between a mass of warm air and a
retreating mass of cold air. At constant atmospheric pressure, warm air is less dense
than cold air, and so it tends to override, rather than displace, the cold air.
11. When an earthquake occurs, the actual point where an earthquake originates is
called the____.
a. Epicenter c. Fault line
b. Focus d. Fissure
Answer: a. Epicenter
Explanation: Epicenter is part of the earth's surface directly above the focus of an
earthquake.
12. Seventy-five percent (75%) of all gases in the atmosphere is found_______.
a. in the Troposphere c. dissolved in water
b. in the thermosphere d. locked in glaciers
Answer: b. in the Troposphere
Explanation: That's because the air is densest in this layer.
13. Precipitation may NOT come in the form of ________
a. sleet c. hail
b. smog d. rain
Answer: b. Smog
Explanation: Smog forms when pollutants are released into the air. Therefore, this
may not come in the form of precipitation.
14. All of the following are renewable energy sources except____.
a. Tides c. Geothermal Vents
b. Sunlight d. Coal mines
Answer: d. Coal mines
Explanation: Renewable energy sources referred as a clean energy, comes from
natural sources or processes that are constantly replenished such as sunlight, tides
and geothermal vents. Coal mines is an example of non-renewable energy.

15. The moon exhibits different phases because:
a. it revolves around the earth
b. it rotates around its axis
c. the Earth revolves around the sun
d. the Earth’s axis is tilted
Answer: a. it revolves around the earth
Explanation: The phases occur because the Sun lights different parts of the Moon as
the Moon revolves around the Earth. The reason we see different phases of the Moon
here on Earth is that we only see the parts of the Moon that are being lit up by the Sun.
16. Which of the following will be found on the surface of the earth.
a. Meteorites c. Meteoroids
b. Asteroids d. Meteors
Answer: a. Meteorites
Explanation: Meteorites falls’ anywhere, they are easiest to spot and most easily
recognized where there are few terrestrial rocks. Most meteorites are believed to come
from comets, which are more fragile than asteroids.
17. Nicolas Copernicus proposed which model of the solar system?
a. Tychonic Model b. Ptolemaic Model
c. Geocentric Model d. Heliocentric Model
Answer: d. Heliocentric Model
Explanation: Copernicus was an astronomer who introduced Heliocentric Model. He
believes that the planets orbit around the Sun; that Earth is a planet which, besides
orbiting the Sun annually.
18. What is the visible part of the Sun called?
a. Sunspot
b. Photosphere
c. Chromosphere
d. Lighting
Answer: b. Photosphere.
The outer region of the Sun that is normally visible from the Earth is called the
photosphere, which means “sphere of light.”
19. When did the Space Age begin?
a. 1940
b. 1957
c. 1980
d. 1999
Answer: b. 1957
The space age began on October 4, 1957, when the Soviet Union launched Sputnik
1, the first man-made Earth satellite.

20. A “carbon footprint” is the _____.
a. amount of the space you occupy
b. amount of carbon paper you see
c. the amount of greenhouse gases you emit
d. none of the above
Answer: c. the amount of greenhouse gases you emit
Explanation: Carbon footprint is the total amount of greenhouse gases that are
generated by the actions of human.

Chemistry (1-10 items)
1. The number of moles of solute present in 1kg of a solvent is called its
a. Molality
b. Molarity
c. Normality
d. Formality
Answer: a. Molality
Explanation: Molality is the property of a solution that is defined as the number of
moles of solute per kilogram of solvent.
2. The metallurgical process in which a metal is obtained in a fused state is called
a. Smelting
b. Roasting
c. Calcinations
d. Froth floatation
Answer: a. Smelting
Explanation: The process of extraction of metal in its molten state by any reducing
agent in the presence of flux is namely the smelting.
3. The law which states that the amount of gas dissolved in liquid is proportional to
its partial pressure is
a. Dalton's law
b. Gay Lussac's law
c. Henry's law
d. Raoult's law
Answer: c. Henry's law
Explanation: In physical chemistry, Henry's law is a gas law that states that the
amount of dissolved gas in a liquid is proportional to its partial pressure above the
liquid. The proportionality factor is called Henry's law constant.
4. The most commonly used bleaching agent is
a. alcohol
b. carbon
c. chlorine
d. sodium chlorine
Answer: c. chlorine
Explanation: Chlorine reacts with water to form Hypochlorous acid along with
Hydrochloric acid. It releases nascent oxygen which serve as a powerful beaching
agent, and responsible for the bleaching action in chlorine

5. The inherited traits of an organism are controlled by
a. RNA molecules
b. DNA molecules
c. nucleotides DNA molecules
d. enzymes
Answer: b. DNA molecules
Explanation: The inherited traits of an organism are controlled by DNA molecules. The
traits of an organism are ultimately determined by the genes that inherited from its
parents, in other words by its genotype. Animals have two copies of all their
chromosomes, one from each parent.
6. The luster of a metal is due to
a. its high density
b. its high polishing
c. its chemical inertness
d. presence of free electrons
Answer: d. presence of free electrons
Explanation: Metallic luster is due to the mobile electrons present in metals which
when de-excites releases energy in the form of light.
7. Which among the following statements correctly defines Cosmic Rays?
a. It is negatively charged particles
b. It is positively charged particles
c. It is charged particles
d. It is uncharged particles
Answer: a. It is negatively charged particles
Explanation: Travelling through the space, cosmic rays are highly energetic atomic
nucleus.
8. _________ is an isotope of hydrogen.
a. Tritium
b. Deuterium
c. Diproton
D - Plutonium
Answer: b. Deuterium
Explanation: Deuterium consists of one proton, one neutron, and one electron.

9._______ is the most reactive halogen?
a. Chlorine
b. Fluorine
c. Bromine
d. Astatine
Answer: b. Fluorine
Explanation: Fluorine is reactive with almost everything instantly.
10. Which among the following restrains ice to melt?
a. Gelatin
b. Calcium
c. Potassium
d. Chlorine
Answer: a. Gelatin
Explanation: Gelatin is also used in shampoos, face masks, and other cosmetics.

Biology (1-10 items)
1. Which of these describe the process of mitosis?
a. Two haploid daughter cells are produced
b. Four diploid daughter cells are produced
c. Two diploid daughter cells are produced
d. Four haploid daughter cells are produced
Answer: c. Two diploid daughter cells are produced
Explanation: In mitosis two daughter cells are produced which are identical to the
parent cell. They contain two sets of chromosomes, and are therefore diploid.
2. What term can be used to describe all cellular respiration?
a. Aerobic
b. Endothermic
c. Anaerobic
d. Exothermic
Answer: d. Exothermic
Explanation: All cellular respiration is exothermic.
3. What is the name given to the specifically shaped region of the enzyme where the
reaction occurs?
a. Substrate
b. Product
c. Active site
d. Reactant
Answer: c. Active site
Explanation: The active site is the region of the enzyme where the substrate fits for a
reaction to happen.
4. What is the function of the cell membrane?
a. To control the substances that enter and leave the cell
b. To carry out respiration
c. To contain the genetic information
d. To synthesize proteins
Answer: a. To control the substances that enter and leave the cell
Explanation: The cell membrane allows certain substances to enter and leave the
cell.
5. It reduces the volume of urine by reabsorbing water.
a. Loop of Henle c. Bowman’s Capsule
b. Collecting duct d. Medulla
Answer: a. Loop of Henle
Explanation: Loop of Henle reabsorbs water and creates a concentrated urine for
excretion.

6. Prokaryotic cells lack
a. nucleolus
b. nuclear membrane
c. membrane bound by organelles
d. all of these
Answer: d. all of these
Explanation: Prokaryotic cells are the primitive cells which are found in the early
formed life on earth. Prokaryotic cells do not possess true nucleus and it is not
surrounded by the nuclear membrane and membrane bound organelles are absent.
7. Plant have ____ while animals lack it.
a. starch
b. cellulose
c. protein
d. fat
Answer: b. cellulose
Explanation: Cellulose is the main form of starch in plants, while glycogen is in
animal.
8. Pollination is best defined as
a. transfer of pollen from anther to stigma
b. germination of pollen grains
c. growth of pollen tube in ovule
d. visiting flowers by insects
Answer: a. transfer of pollen from anther to stigma
Explanation: Pollination can be best defined as the transfer of pollen from the male
anther of a flower to the female stigma to produce new offspring.
9. Sleeping sickness in man is caused by the organism
a. Plasmodium
b. Entamoeba
c. Giardia
d. Trypanosoma
Answer: d. Trypanosoma
Explanation: Human African trypanosomiasis, also known as sleeping sickness, is a
vector-borne parasitic disease. It is caused by infection with protozoan parasites
belonging to the genus Trypanosoma.
10. The muscle which separate the right side and left side of heart is known as
a. Keratin
b. Maxilla
c. Septum
d. Tubercules
Answer: c. Septum
Explanation: A wall of muscle called the septum separates the left and right atria and
the left and right ventricles.

Physics (1-10 items)
1. Light from the Sun reaches us in nearly
a. 2 minutes
b. 4 minutes
c. 8 minutes
d. 16 minutes
Answer: c. 8 minutes
Explanation: The light from the sun takes about 8 minutes to reach the Earth after it
has been emitted from the sun's surface.
2. A man presses more weight on earth at
a. Sitting position
b. Standing Position
c. Lying Position
d. None of these
Answer: b. Standing Position
Explanation: When the man is standing in the ground the area will be Minimum. So,
when the area is minimum the pressure will be maximum. (Pressure= Force/Area)
3. A piece of ice is dropped in a vessel containing kerosene. When ice melts, the
level of kerosene will
a. Rise
b. Fall
c. Remain Same
d. None of these
Answer: b. Fall
Explanation: Kerosene density is less than water. So, when ice is dropped in
kerosene it will sink down.
4. If electrical conductivity increases with the increase of temperature of a substance,
then it is a:
a. Conductor
b. Semiconductor
c. Insulator
d. Carborator
Answer: b. Semiconductor
Explanation: In semiconductor as the temperature increases, the carrier concentration
increases significantly, this is because extra electrons are excited from the valence
band to the conduction band, due to which the number of free electrons increases.

5. Which one of the following has the highest value of specific heat?
a. Alcohol
b. Methane
c. Kerosene
d. Water
Answer: d. Water
Explanation: Among all the four given liquids, only water has the highest specific
heat.
6. The electric motor converts
a. Electrical energy into mechanical energy
b. Mechanical energy into electrical energy
c. Electrical energy into light energy
d. None of these
Answer: a. Electrical energy into mechanical energy
Explanation: An electric motor transforms electrical energy into mechanical energy.
The electric motor works on principle of electromagnetic induction, which is when a
voltage is induced by a changing magnetic field.
7. Which statement is correct?
a. The gold sinks in mercury.
b. The density of gold is lesser than the density of mercury.
c. Both
d. None of these
Answer: a. The gold sinks in mercury
Explanation: The density of gold is higher than the density of mercury.
8. An atomic pile is used for
a. Temperature
b. Conducting nuclear fission
c. Conducting thermonuclear fission
c. Producing X-rays
Answer: b. Conducting nuclear fission
Explanation: An atomic pile is a nuclear reactor that uses controlled nuclear fission to
generate energy.
9. Gamma rays are
a. Electromagnetic waves
b. Helium nucleus
c. Fast moving electron
d. Single ionized gas atom
Ans: a. Electromagnetic waves
Explanation: Gamma rays Are very high energy photons and are electromagnetic
waves.

10. metal sheet with a circular hole is heated. The hole
a. gets larger
b. gets smaller
c. retains its size
d. is deformed
Answer: a. gets larger
Explanation: When a metal sheet is heated, it starts expanding and its surface area
will start increasing, which will lead to an increase in the radius of the hole. Hence,
the circular hole will become larger.

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