This document contains 150 multiple choice questions covering a wide range of science and general knowledge topics, including: - Chemical reactions in cells and energy conversion - States of matter and phase changes - Acids and bases - Medical devices like pacemakers - Scientific experiments and the scientific method - Biology topics like diffusion, kingdoms of organisms, and animal diseases - Environmental science concepts - Physics principles like forces, motion, and energy - Earth science topics like seasons, earthquakes, and weather systems - Elements and the periodic table - Health and nutrition - History and civics The questions assess knowledge across many STEM disciplines and subject areas in 3-4 sentences or less per question.

1. 101. When we say that chemical reactions in the cell waste energy, we mean that:
A. Energy is being destroyed
B. Pieces of chemicals are being broken
C. Chemical energy is being converted to heat energy which is lost
D. Cells use only the chemicals they need and get rid of all excess
102. Which of the following process takes place when ice cubes form vapor without passing
through liquid state?
A. Transpiration
B. Condensation
C. Sublimation
D. Evaporation
103. In which of the following mediums will sound travel slowest?
A. Air
B. Brick
C. Oil
D. Water
104. Large quantities of calcium carbonate are dumped into polluted lakes to fight the effect of
acid rain. It is inferred from this action that calcium carbonate is a/an _________________.
A. Acid
B. Base
C. Neutral substance
D. Powdered substance
105. Today, a computerized machine could send regular electrical impulses to the heart
muscles in order for it to beat rhythmically. What is this machine called?
A. Homeostatic machine
B. Laser
C. Pacemaker
D. Pressure maker
106. A grasshopper was put inside a covered bottle. After sometime, the grasshopper died.
The statement: “the grasshopper died because of the oxygen in the bottle was exhausted
is__________________.
A. A fact
B. A hypothesis
C. An inference
D. A conclusion
107. Chemicalà heat energyà mechanical energy (with wasted heat)
The sequence of energy changes shown explains which event?

2. A. A flashlight is on
B. A candle burns
C. Gasoline burns to power a car
D. Electric current runs a refrigerator
108. Consider the problem: “which toothpaste brand is more effective in killing mouth bacteria?”
which of the following variables is manipulable?
A. Brands of toothpaste
B. Brands of toothbrush
C. Number of time to brush teeth
D. Number of persons to brush teeth
109. The following statements given the underlying principles of technology except:
A. All the technological system could fail
B. All technologies involve control
C. Technologies always have side effects
D. Technology often provides tools for science without constraint
110. ________are professionals who are experts in handling animal disease
A. veterinarians
B. animal husbandry
C. doctors of cattle
D. doctors of medicine
111. The school physician prescribed ______________ to children in inner town who are
suffering from night blindness.
A. vitamin C
B. vitamin A
C. iron sulfate
D. vitamin B 12
112. ________is used to measure the volume of liquids.
A. beam balance
B. beaker
C. meter
D. graduated cylinder
113. Among the materials below which can best transmitted sounds?
A. gas
B. water
C. metal
D. air
114. Earthquake intensity can be measure by using

3. A. anemometer
B. barograph
C. seismograph
D. psychrometer
115. Voting is one of our constitutions rights. Those who are deprived their votes are normally.
A. execute
B. disenfranchised
C. franchised
D. exiled
116. Glass breaks easily. Which property of matter is exhibited?
A. Tenacity
B. Ductility
C. Malleability
D. Brittleness
117. Phenomenon when the length of day and night varies depending on the inclination of the
earth’s axis?
A. Coriolis effect
B. Solstice
C. Spring
D. Equinox
118. Why does the greenhouse effect result temperature near the earth’s surface?
A. Ozone traps ultraviolet radiation
B. Clouds trap infrared radiation
C. Carbon dioxide traps infrared radiation
D. Soil absorbs incoming radiation
119. Why do the four seasons occur on earth?
A. The sun’s axis is tilted
B. The earth rotates on its axis
C. The earth rotates from west to east
D. The earth’s axis is tilted
120. Simplest substance that cannot be decomposed further by ordinary chemical means?
A. atom
B. compound
C. mixture
D. element
121. What may occur when the blood vessel going to the brain is blocked?
A. Heart attack

4. B. Stroke
C. Hemorrhage
D. Tumor
122. Which of the following concepts is relevant to environmental education?
A. Infiniteness of resources utilization
B. Advent of inorganic fertilizers
C. Balance of nature and interdependence
D. Rapid urbanization and dependence
123. This is the amount of space occupied by matter.
A. density
B. Volume
C. Weight
D. Mass
124. Greenhouse effect is caused by
A. excessive use of solar energy
B. use of carbon dioxide by green plants
C. destruction of our forests
D. depletion of minerals by over farming
125. A diet full of animal fat usually come up with Patients found ill of:
A. diabetes
B. Hypertension
C. kidney malfunction
D. Sclerosis
126. Molds are under what kingdom?
A. protista
B. fungi
C. plantae
D. Animalia
127. Diffusion in the human body_____
A. regulates blood flow.
B. plays an insignificant role in the body’s functioning
C. allows an even distribution of substances throughout all cells of the body
D. comes into play in times of extreme illness
128. Streptococcus is under what kingdom?
A. Protista
B. Fungi
C. Plantae

5. D. Monera
129. When a bus suddenly stops, standing passengers tend to move forward, this because of
A. friction
B. centripetal force
C. gravity
D. inertia
130. Smoke is a harmful form of ozone. This can be found in _______
A. troposphere
B. stratosphere
C. ionosphere
D. exosphere
131. Children in upland areas are prone to goiter. What do they need for their diet?
A. Multivitamins
B. iodine
C. Protein
D. iron
132. The source of energy responsible for life on earth is_____
A. moon
B. star
C. wind
D. sun
133. Flooding is often times attributed to:
A. wanton destruction of gold mines
B. wanton cutting of forest trees
C. conversion of agricultural land to subdivisions
D. using wood for fuel
134. _____ is the simplest substance that cannot be decomposed further by normal chemical
means.
A. molecule
B. mixture
C. compound
D. element
135. ______explains why a bullet from a gun eventually falls to the ground.
A. Universal Gravitation
B. Applied force
C. Action and reaction
D. Inertia

6. 136. During wars, what is most dreaded by nations?
A. biological war
B. Atomic bomb
C. anthrax
D. hydrogen bomb
137. Children are discourage to play in floodwater since:
A. feces of cockroaches are floating
B. urine of rats are contagious
C. feces and urine of animals abound
D. urine of people around
138. Which of the following is an important factor in explaining why seasons occur in the Earth?
A. Earth rotates on its axis
B. The sun rotates on its axis
C. Earth axis is tilted
D. The sun’s axis is tilted
139. Which of the following is an orderly, systematic approach to problem solving?
A. Conclusion
B. hypothesis
C. experiment
D. scientific method
140. What is the correct order for steps in the scientific method?
A. Gather data, formulate hypothesis, have a question , develop method, draw conclusion
B. Formulate hypothesis, have q question, draw conclusion, gather data, develop method
C. Have a question, formulate hypothesis, develop method, gather data, draw conclusion
D. Develop method, have a question, formulate hypothesis, draw conclusion, gather data
141. Which of the following environmental conditions has been blamed for the usual occurrence of
“fish kills”?
A. Acid rain
B. Eutrophication
C. Atmospheric pollution
D. Silting of lakes
142. What is the escape mechanism by which the mud fish and the catfish change from darker
colour to a lighter colour one depending on the colour of the water called?
A. Protective mimicry
B. Adaptive coloration
C. habitat protection
D. aggressive coloration

7. 143. Good weather usually prevails in a high-pressure area .This is because the descending air
which characterizes a high-pressure area___________________________
A. Cools and increases its capacity to hold water vapour
B. Warms and reduces its capacity to hold water vapour
C. Warms and increases its capacity to hold water vapour
D. Cools and reduces its capacity to hold water vapour
144. Which of the following technologies can serve as alternatives to scalpels and cauterization?
i. Lasers ii Inoculation iii.
Ultrasound iv. Radiation
A. i and iii
B. i,iii,iv
C. ii,iii,iv
D. ii and iv
145. Which of the following is an example of a physical change?
A. Burning metal
B. Changing of iodine crystals into a violet gas
C. Formation of two gases during electrolysis of water
D. Formation of a black solid from heated iron and sulfur
146. Good weather usually prevails in a high-pressure area. This is because e descending air
which characterizes a high-pressure area_______________________________
A. Cools and increases its capacity to hold water vapor
B. Warms and increases its capacity to hold water vapour
C. Warms and reduces its capacity to hold water vapor
D. Cools and reduces its capacity to hold water vapour
147. Ultrasound is often used by medical workers to obtain features of internal body parts.
Infrasound on the other hand is commonly used in ________________________.
A. Monitoring conditions in pregnant women
B. Detecting harmful living tissues inside the body
C. Seismographic surveying of structures below the earth’s surface
D. Providing instant moving pictures of tidal waves and earthquakes
148. How is the conservation of mechanical energy described in a falling object?
A. A falling object loses kinetic and gains potential energy
B. A falling object loses kinetic energy and loses potential energy
C. A falling object gains kinetic energy and gains potential energy
D. A falling object gains kinetic energy and loses potential energy
149. When we say that chemical reactions in the cell waste energy, we mean that:
A. Energy is being destroyed

8. B. Pieces of chemicals are being broken
C. Chemical energy is being converted to heat energy which is lost
D. Cells use only the chemicals they need and get rid of all excess chemicals
150. He is known for his “Philippine 2000” which is meant to make the Philippines as an
economically developed country.
A. Ferdinand Marcos
B. Fidel Ramos
C. Diosdado Macapagal
D. Joseph Estrada