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WorksheetsUPCAT Reviewer (SCIENCE)
Total questions: 100
Worksheet time: 5hrs 0mins
In a solution the substance that does the dissolving is called ______.
concentration
solute
electrolyte
solvent
Which of the following reasons best describes why water is a good solvent?
It is a negatively charged ion.
It repels most molecules.
It is such a small molecule.
Due to its polarity and small molecular size.
A solution that cannot hold any more solute at room temperature would be classified as ___________.
dilute solution
concentrated solution
saturated solution
supersaturated solution
Ethanol dissolved in water is an example of what kind of solution?
solution between two miscible liquids
solution between a solid and liquid
suspension between two liquids
ethanol and water do not form a solution
To form a supersaturated solution requires ________.
equal amount of solute and solvent
a larger container for the solution
reducing the amount of solute
reducing the amount of solvent
Which one of the following is an example of a physical change?
an iron rusting
a steak cooking
a sugar dissolving in water
a candle burning
Which one of the following is not a physical change?
clothes drying in the dryer
making a cup of coffee
chopping wood
boiling an egg
What happens to the properties of a substance after a chemical change?
properties are identical before and after the change
properties are different before and after the change
neither of the two statements are correct
either of the two statements are correct
Heptane is always composed of 84% carbon and 16% hydrogen by mass. What law does this observation illustrate?
Law of Multiple Proportions
Law of Definite Proportions
Law of Conservation of Mass
Law of Conservation of Energy
Provide the mass number for an atom that has 10 protons, 10 electrons, and 11 neutrons.
31
20
10
21
Based on the table, how much of substance W will react with 9.0 g. of substance Z?
9.0 g
12.0 g
15.0 g
18.0 g
Assuming that substance W is in excess, the amount of substance WZ that will be produced from 12.0 g of substance Z is _____________ .
22.5 g
27.0 g
31.5 g
36.0 g
Which of the following conditions will increase the rate of chemical reaction?
decreased temperature and decreased concentration of reactants
decreased temperature and increased concentration of reactants
increased temperature and decreased concentration of reactants
increased temperature and increased concentration of reactants
When a lit match is touched to the wick of a candle, the candle begins to burn. When the match is removed, the candle continues to burn. In this reaction, the match _____________.
behaves as a catalyst for the reaction
supplies the activation energy
lowers the activation energy barrier
serves as a part of the rate determining step
Compared to a glass of ice water with ice in it, a glass of plain cold water without ice on a warm day will warm up _______________.
faster
slower
cannot be determined
still at the same time
The solubility of a substance was determined in 300 cm^3 water at different temperatures. The graph presented shows a part of the data obtained. Based on the data presented, how much of the substance will dissolve at 75˚C in a 150 cm^3 water?
18 g
20 g
36 g
40 g
Which of the following statements is true based on the picture?
water molecules are attracted by electrodes
sodium chloride dissociates when placed in water
chlorine ions are attracted to a negative electrode
current flow cause an increase in water temperature
Which of the following statements is true based on the picture?
only chlorine ions conduct current
the closed circuit illustrated results in neutrality
the solution illustrated will not conduct current
ions are attracted to electrodes having opposite electrical charges
Jacques Charles was a French hot air balloonist and scientist. He discovered Charles' law by studying the relationship between the volume and temperature of a gas at a constant atmospheric pressure.
Based on the Charles' Law, if the volume of a gas at a certain pressure is halved, temperature is _________.
also halved
doubled
remains constant
increases according to a geometric progression
Which of the following shows the correct graph temperature-volume relationship for a gas based on Charles' Law?
NOTE: (T = temperature and V = volume)
According to one of Newton's Law of Motion (first law), unless an object at rest is acted upon by a force, it stays at rest due to its __________.
matter
inertia
friction
gravity
Marlon rode on his bike from 9:00 am to 10:30 am. If he drove at an average speed of 15 kph, what was the total distance he covered?
17.5 km
22.5 km
27.5 km
32.5 km
A woman exerts a constant horizontal force on a large box. As a result, the box moves across a horizontal floor at a constant velocity. The constant force by the woman _________.
has the same magnitude as the weight of the box
is greater than the weight of the box
has the same magnitude as the total force which resists the motion of the box
is greater than the total force which resists the motion of the box
A woman exerts a constant horizontal force on a large box. As a result, the box moves across a horizontal floor at a constant velocity. If the woman suddenly stops applying a horizontal force to the box, then the box will ____________.
immediately come to a stop
continue moving at a constant speed for a while and then slow to a stop
immediately start slowing to a stop
continue at a constant speed
A 0.20 kg block is attached to a spring which has a spring constant of 20 N/m. The block is initially stretched 0.10 meters and released at time t = 0 seconds.
Complete the following statement: In order to increase the frequency of the motion, one would have to ______.
reduce the spring constant
decrease the mass of the block on the end of the spring
increase the length of the spring
reduce the distance that the spring is initially stretched
Which of the following graphs below shows a body moving at constant speed?
Which of the graphs shows a body moving at high acceleration at the beginning then starts to lose acceleration towards the end?
The acceleration in a body is due to ________________.
balanced force
unbalanced force
electrostatic force
its mass
Two students are posed to dive off equal height diving towers to a swimming pool below. Student B is twice as massive as student A.
Which of the following is true based on the scenario above?
Student B will reach the water sooner than student A.
Both students have the same gravitational potential energy.
Both students will have the same kinetic energy just before hitting the water.
Student B did twice as much work climbing the tower.
Which of the following cases is NOT a uniformly accelerated motion?
A feather falls from a certain height inside a vacuum tube.
A ball rolls along a frictionless plane at uniform speed.
A coin falls from a certain height in air but air resistance is negligible.
A skydiver jumping out of a plane.
Which of the following is true based on the illustration being presented?
cube A has the least weight
cube C has the highest density
cube A has the highest density
water has greater buoyant force than cube A
Which of the following is the most probable reason why cube C sinks in the illustration presented?
it weighs much
it displaces much water
its weight is less than the weight of the water it has displaced
its weight is greater than the weight of the water it has displaced
What is the direction of the force exerted by the ladder on the illustration presented?
downward and toward the wall
downward and away from the wall
upward and toward the wall
upward and away from the wall
A 200 N box is pushed up an incline that is 5.00 m long and rises 1.00 m. If the incline is frictionless, then the work done by the pushing force is ______.
336 J
305 J
275 J
200 J
A 2000 kg car accelerates from rest to a velocity of 20 m/s in 10 seconds. The power of the engine during this acceleration is ______.
200 kW
20,000 kW
4000 W
40 kW
A gem or mineral that is red absorbs ________ .
red light only
mostly red light
most wavelength of the visible spectrum except red
more of the visible spectrum than a gem or mineral that is violet
When viewed straight down (90° to the surface), an incident light ray moving from the water to air is refracted ____________.
away from the normal
toward the normal
not at all
into the normal
What is the most valid reason why people nearby can smell someone wearing a perfume on their wrist?
the particles of perfume spread from an area of higher concentration (wrist) to areas of lower concentration (air)
the particles of perfume remains on the wrist and doesn't travel through the air
some of the perfume leaves the wrist, mixing with air particles
the perfume has a strong odor and is expensive
A certain flashlight has three identical 1.5 volt batteries in it, arranged in a chain to give a total of 4.5 volts. Current passes first through battery (a), then through battery (b), then through battery (c), on its way to the bulb. The batteries provide power to the current and they gradually use up their chemical potential energy when operated.
Which battery will run out of chemical potential energy first?
Battery (a) will run out first
Battery (b) will run out first
Battery (c) will run out first
All three will run out at the same time
What heat transfer processes are involved at positions E and F in the illustration presented?
E is radiation and F is conduction
E is conduction and F is convection
E is convection and F is conduction
E is radiation and F is convection
An astronaut picks up a stone on the moon and finds its mass to be 2 kg. The gravity at the surface of the Earth is six times more than the gravity at the surface of the Moon.
What will the mass and the weight of the stone be on the earth?
2kg 12N
2kg 20N
12kg 120N
20kg 200N
Water is boiled in a flask with a balloon over the top. As the water heats, the balloon expands. What has happened to the weight of this flask and balloon in this experiment?
It has increased as the balloon expands
It has decreased as the water boiled away
It has stayed the same
It is unpredictable because the balloon is flexible
A student wishes to find the density of an irregular piece of rock. How will the student solve to find the volume?
length x width x height
place it on a triple beam balance
put it in a beaker
use water displacement
A barge filled with scrap iron is in a canal lock. If the barge were to sink what would happen to the water level?
falls
rises
remains unchanged
cannot be determined, mass unknown
Suppose a simple pendulum clock which keeps correct time on Earth (acceleration due to gravity = 9.8 m/s^2). Without changing the clock, the pendulum clock is taken to the Moon (acceleration due to gravity = 1.6 m/s^2).
For every hour interval (on Earth) the Moon clock will record __________.
(9.8/1.6) hours
(1.6/9.8) hours
√ (9.8/1.6) hours -- square root of...
√ (1.6 / 9.8) hours -- square root of...
As a star exhausts hydrogen in its core, it becomes _________ .
hotter and more luminous
cooler and more luminous
hotter and less luminous
cooler and less luminous
An upright stick that is allowed to cast a shadow in sunlight is called ________.
almagest
primum
equinox
gnomon
A solar or lunar eclipse will likely occur when _______________.
the sun is near the line of nodes of the moon and the moon is new or full
the sun is near the solstice and the moon is new or full
the sun is near the equinox and the moon is new or full
the moon is at third quarter and the sun is closer to Earth
How much time should it take for a traveling bullet to hit the ground compared to a bullet dropped from rest?
Note: Assume the ground remains flat for the entire distance the bullet may travel.
The traveling bullet will take longer to hit the ground than the bullet dropped from rest
The traveling bullet will hit the ground at the same time as the bullet dropped from rest
The traveling bullet will hit the ground before the bullet dropped from rest
The traveling bullet moves so fast that it will never hit the ground
Bart placed four identical candles on a table and lit them. He covered the first candle with a big jar, the second with a medium-sized jar, and the third with a small jar. He left the last candle uncovered.
Which candle probably took the longest time to burn?
the lit candle left uncovered
the lit candle covered with the biggest jar
the lit candle covered with the smallest jar
the lit candle covered with the medium-sized jar
Which of the following is not considered a simple machine?
wedge
pulley
lever
wheelbarrow
Based on the table, country shows the greatest rate of increase over the years?
Hongkong
Kuwait
Italy
USA
Based on the table (left), the graph (right) shows the number of OFW’s in which country?
Hongkong
Kuwait
Italy
USA
The graph shows the data derived from a substance being heated by a source supplying 1000 calories per minute.
The freezing point of this substance is __________.
0 °C
10 °C
20 °C
30 °C
The graph shows the data derived from a substance being heated by a source supplying 1000 calories per minute.
The boiling point of this substance is __________.
10°C
20 °C
30 °C
40°C
The graph shows the data derived from a substance being heated by a source supplying 1000 calories per minute.
The substance undergoes a phase change between the ___________.
4th and 6th minutes
6th and 14th minutes
14th and 18th minutes
16th and 22nd minutes
The graph shows the data derived from a substance being heated by a source supplying 1000 calories per minute.
How many calories are needed to completely melt the sample at its melting point?
500
1000
2000
3000
The graph shows the data derived from a substance being heated by a source supplying 1000 calories per minute.
How long did it take for the substance to completely turn into gas?
4 minutes
6 minutes
10 minutes
16 minutes
The graph shows the data derived from a substance being heated by a source supplying 1000 calories per minute.
The substance is solid at ____________.
2 minutes
5 minutes
10 minutes
18 minutes
The graph shows the data derived from a substance being heated by a source supplying 1000 calories per minute.
How many calories are needed to completely change the sample into a liquid?
4000
6000
14 000
16 000
What factor distinguishes a suspension from a colloid?
light reflects off the particles of a suspension
particles of a suspension will sink out if left over time to rest
suspensions are clear
suspensions cannot be filtered
Moranta placed 1 kg. of sandy soil and 1 kg. of clay soil into Pot A and Pot B respectively. She then poured equal volumes of water into each pot. After a day, it is expected that ____________.
Pot A will weigh more than Pot B
Pot B will weigh more than Pot A
Pot A and Pot B will weigh the same
Pot A will be wet and Pot B will be dry
Hydrogen and oxygen molecules in a gas sample have the same temperature. This means the hydrogen molecules, on the average, have the same __________.
speed, but more kinetic energy
kinetic energy, but more speed
kinetic energy, but less speed
speed and the same kinetic energy
Acids are substances that ___________.
form hydronium ions when dissolved in water
turn red litmus paper blue
taste bitter
react with neutral liquids to form bases
Marinades for meat commonly include acids such as vinegar or wine, because the acids can ____________.
toughen meat
tenderize meat
preserve meat
react with salt
The basic requirement for the separation of the components by __________________ is that the composition of the vapor be different from the composition of the liquid at the boiling point of the liquid.
absorption
distillation
extraction
crystallization
The fact that 8.0 g of oxygen and 1.0 g of hydrogen combine to give 9.0 of water demonstrates what natural law?
Law of Multiple Proportions
Law of Periodicity
Law of Conservation of Mass
The Atomic Theory
What are the coefficients that will balance the formula equation below?
AlCl3 + NaOH → Al(OH)3 + NaCl
Al (1) Cl3 (3) + Na (1) OH (3) → ...
Al (3) Cl3 (1) + Na (3) OH (1) → ...
Al (1) Cl3 (1) + Na (1) OH (3) → ...
Al (1) Cl3 (3) + Na (3) OH (1) → ...
A hydrocarbon that contains one or more double bonds is classified as _______________.
alkyne
alkene
ketone
alkane
When heat is absorbed by the system from the surroundings, the process is said to be ____________ , and the sign of process is ____________.
exothermic, negative
endothermic, positive
exothermic, positive
endothermic, negative
Which of the following did not help Darwin formulate his theory of evolution?
fossil evidence that species had changed over time
closely related species on oceanic islands
belief that the Earth was several thousand years old
evidence of artificial selection in domestic animals
Which of the following pairs are analogous structures?
the front leg of a horse and a human arm
the front leg of a frog and a bat wing
the wing of a bird and a bat wing
the front flipper of a porpoise and a human arm
Of the following biological levels of organization in the following options, which represents the smallest or lowest level?
organs
organisms
cells
tissues
Which of the following is not a property of life?
molding or adapting to one's environment
regulating materials that enter or leave the system
responding to stimuli
reproducing, passing hereditary material to the next generation
Five positions of a swinging pendulum are shown in the following diagram. A and E are the highest positions attained by the pendulum; the lowest is C.
The kinetic energy of the pendulum is highest at position(s) __________.
Point C
Point B and D
Point A and E
Point A, C and E
Five positions of a swinging pendulum are shown in the following diagram. A and E are the highest positions attained by the pendulum; the lowest is C.
Speed is minimum at position(s) _________.
Point C
Point B and D
Point A and E
Point A, C and E
The sexually-transmitted disease gonorrhea is becoming difficult to treat because the causative bacteria are evolving resistance to antibiotics. For example, in Hawaii between 1997 and 1999 resistance to fluoroquinolones increased from 1.4 percent to 9.5 percent. Scientists attribute this to natural selection.
What does natural selection mean in this context?
mutation rate for antibiotic resistance increased during the time period
antibiotic has changed the genetic structure of the germs allowing them to become antibiotic-resistant
germs changed their genetic code in order to avoid problems with the antibiotic
antibiotic created an environment in which germs harboring antibiotic resistant genes could flourish
A slippery outer covering in some bacteria that protects them from phagocytosis by host cells is known as _____________.
capsule
cell wall
flagellum
peptidoglycan
Differences between eukaryotic and prokaryotic cells include all of the following except __________.
eukaryotic cells have mitochondria
eukaryotic cells have cilia and flagella with complex structure
prokaryotic cells have more complex cell walls
prokaryotic cells have no genetic material
The optimum temperature for an organism is the one at which it _________________.
grows with the shortest generation time
has the longest time between cell divisions
is near one extreme of its range of tolerated temperatures
has enzymes that begin to denature
Based on the illustration provided, which of the following is true?
Note: Both A and B are liquids while C is a solid.
C is denser than both A and B
C is less than B but denser than A
C is less dense than A but denser than B
C has just about the same density as both A and B
The graph shows the movement of car in velocity at a given time.
At which point is the car decelerating?
Point A
Point B
Point C
Point D
The graph shows the movement of car in velocity at a given time.
At which point is the car accelerating rapidly?
Point A
Point B
Point C
Point D
In a plant, what part stores sugars as starch?
leaves
roots
seeds
all of the above
Adenosine diphosphate (ADP) is an energy used for __________________.
synthetic reactions
active transport
all energy-requiring processes in cells
necrosis
The cytoskeleton of the cell functions to ___________.
give the cell shape
anchor organelles
allow organelles to move
all of the above
A red blood cell plasma membrane contains _____________ different types of proteins.
over 10
over 20
over 40
over 50
During __________________ , the chromosomes attach to the spindle and align at the metaphase plate of the spindle.
prophase
prometaphase
metaphase
anaphase
Assuming that each container in the illustration presented contain equal volumes of water, what container is the pressure at the bottom greatest?
Container A
Container B
Container C
pressure is the same in each container
Based on the illustration presented, at which point on the door will you apply the greatest force to close it?
Point A
Point B
Point C
Point D
Graphs of distance (d) or velocity (v) of a body against time (t) are shown in the following.
Which one shows that of a body is at rest?
Which of the velocity-time graphs in the figure represents an object falling freely in a vacuum?
Note: (v = velocity, t = time)
If the pendulum on the illustration presented was swinging in the direction indicated by the arrow when its string was suddenly cut, in what direction did the pendulum go?
The illustration shows water flowing through a river at given points.
If the water flows in the direction indicated by the arrows in the illustration below, at which point is the flow fastest?
Point A
Point B
Point C
Point D
If two flies heterozygous for wing length and body color are crossed, which of the following are possible results?
chance of long wings (L) = 3/4
chance of short wings (I) = 1/2
chance of grey body (G) = 1/4
all of the possible results presented are true
A cross in which true-breeding plants differ in two traits is known as a ________________ cross.
test
dihybrid
multi trait
hybrid
Which of the following is the narrowest based on its scale in an ecological system?
fundamental niche of an organism
realized niche of an organism
habitat of an organism
none, all are the same
Which of the following is a protozoa that has no means of locomotion?
amoeboids
ciliates
zooflagellates
sporozoa
Which of the following describes a vertebrate skeleton?
it is a living tissue which grows with the animal
it protects internal organs of a vertebrate
it serves as a place of attachment for muscles
all statements presented are true
Protoplasts are cells without __________.
nucleus
cell membrane
cell wall
cytoplasm
