Science

Question 1

In a river, if the water flows in the direction indicated by the arrows below, at which point has the highest velocity?

Answer 1

A) A
B) B (ANSWER)
C) C
D) D
E) answer is not among the choices

Question 2

A car and a delivery truck both start from rest and accelerate at the same rate. However, the car accelerates for twice the amount of time as the truck. What is the final speed of the car compared to the truck?

Answer 2

A) half as much
B) TWICE AS MUCH
C) the same
D) 4x as much
E) answer is not among the choices

Question 3

An object is dropped from rest from a certain height. Air resistance is negligible. After falling a distance d, the object’s kinetic energy is proportional to which of the following?

Answer 3

A) 1/d²
B) 1/d
C) 1/√d
D) d (ANSWER)
E) answer is not among the choices

Question 4

Which of the following cell parts are found in both animal and plant cells?

Answer 4

A) Lysosomes
B) Vacuoles
C) RIBOSOMES
D) Chloroplast
E) answer is not among the choices

Question 5

Which among the following has the highest boiling point?

Answer 5

A) H₂O (ANSWER)
B) CO₂
C) CH₄
D) NH₃
E) answer is not among the choices

Question 6

The wavelengths of radiation emitted by Earth are _______.

Answer 6

A) longer than those emitted by the Sun
B) SHORTER THAN THOSE EMITTED BY THE SUN
C) about the same as those emitted by the Sun
D) none of the these
E) answer is not among the choices

Question 7

Why are chlorofluorocarbons so damaging to the ozone layer when they are such stable molecules?

Answer 7

A) They contain a double bond that ozone readily attacks resulting in the destruction of the ozone.
B) They are very light molecules that rapidly diffuse into the upper atmosphere and block the radiation that causes the formation of ozone.
C) They are greenhouse gases that raise the temperature above the dissociation temperature of ozone.
D) THE RADIATION IN THE ATMOSPHERE DISSOCIATES THEM PRODUCING CHLORINE ATOMS THAT CATALYTICALLY DESTROY OZONE
E) answer is not among the choices

Question 8

Two identical cars are traveling at the same speed. One is heading due east and the other due north. Which statement is true regarding the kinetic energies and momenta of the cars?

Answer 8

A) They both have the same kinetic energies and the same momenta.
B) THEY HAVE THE SAME KINETIC ENERGIES, BUT DIFFERENT MOMENTA.
C) They have different kinetic energies, but the same momenta.
D) They have different kinetic energies and different momenta.
E) answer is not among the choices

Question 9

Which one of the following is NOT related to chemical weathering?

Answer 9

A) decomposition
B) FROST WEDGING
C) hydrolysis
D) oxidation
E) answer is not among the choices

Question 10

What differentiates a eukaryotic cell from a prokaryotic cell?

Answer 10

A) PRESENCE OF TRUE NUCLEUS
B) presence of chromosomes
C) presence of membranes
D) none of the above
E) answer is not among the choices

Question 11

Which of the following statements does not describe deoxyribonucleic acid?

Answer 11

A) Responsible for storing and transmitting genetic information
B) Double-stranded helix
C) Uses A-T (adenine-thymine) & G-C (guanine-cytosine) pairing bodies
D) TRANSFER GENETIC CODE NEEDED FOR PROTEIN CREATION FROM CELL NUCLEUS TO THE RIBOSOMES
E) answer is not among the choices

Question 12

Which statement about hydrocarbons is false?

Answer 12

A) The smallest alkane to have structural (constitutional) isomers have 4 carbon atoms.
B) Cyclic alkanes are structural isomers of alkenes.
C) ALKANES ARE MORE REACTIVE THAN ALKENES.
D) Alkanes can be produced by hydrogenating alkenes.
E) answer is not among the choices

Question 13

Which statement about atmospheric pressure is false?

Answer 13

A) AS AIR BECOMES THINNER, ITS DENSITY INCREASES.
B) Air actually has weight.
C) The warmer the air, the lower the atmospheric pressure
D) Atmospheric pressure prevents water in lakes, rivers, and oceans from boiling away.
E) answer is not among the choices

Question 14

A small plane climbs with a constant velocity of 250 m/s at an angle of 28° with respect to the horizontal. Which statement is true concerning the magnitude of the net force on the plane?

Answer 14

A) IT IS EQUAL TO ZERO
B) It is equal to the weight of the plane.
C) It is equal to the magnitude of the force of air resistance.
D) It is equal to the component of the weight of the plane in the direction of motion.
E) answer is not among the choices

Question 15

The point in stellar evolution when a star has used up all its fuel and is radiating away its remaining thermal energy as light is the ________ stage.

Answer 15

A) black hole
B) main-sequence star
C) red giant
D) WHITE DWARF
E) answer is not among the choices

Question 16

The unit structure of a gene is made up of _______?

Answer 16

A) endoplasmic reticulum
B) Ribonucleic acid
C) DEOXYRIBONUCLEIC ACID
D) Neuron
E) answer is not among the choices

Question 17

A projectile is fired from the surface of the Earth with a speed of v₀ at an angle of 30° above the horizontal and hits a target at a range R from the starting point. If the ground is level, at what other angle above the ground could a second projectile be fired to hit the same target?

Answer 17

A) 30°
B) 40°
C) 60° (ANSWER)
D) 70°
E) answer is not among the choices

Question 18

Which of the following energy sources is thought to drive the lateral motions of Earth’s lithospheric plates?

Answer 18

A) Gravitational attractive forces of the Sun and Moon
B) Electrical and magnetic fields localized in the inner core
C) EXPORT OF HEAT FROM DEEP IN THE MANTLE TO THE TOP OF THE ASTHENOSPHERE
D) Swirling movements of the molten iron particles in the outer core
E) answer is not among the choices

Question 19

What do we mean when we say that “organisms with favorable variations reproduce more successfully than organisms with less favorable variations”?

Answer 19

A) Use and Disuse
B) Production
C) SURVIVAL OF THE FITTEST
D) Cross-breeding
E) answer is not among the choices

Question 20

Most plants are not suitable for human consumption. This is because we do not possess the ability to digest them properly. Why is this so?

Answer 20

A) We can’t chew them properly.
B) THEY HAVE A HIGH CONCENTRATION OF CELLULOSE.
C) They are poisonous.
D) Plants have an anti-digestion substance in them.
E) answer is not among the choices

Question 21

If air resistance can be neglected, what happens to the horizontal velocity of a basketball as it is thrown to the basket from the free-throw line?

Answer 21

A) increases
B) decreases
C) increases while the ball is going up, and then decreases when the ball is coming down.
D) increases while the ball is going up, and then increases when the ball is coming down.
E) ANSWER IS NOT AMONG THE CHOICES

Question 22

Carbon dioxide contributes to global warming by ________.

Answer 22

A) absorbing incoming radiation from the sun and converting it to heat
B) ABSORBING RADIATION EMITTED FROM THE SURFACE OF THE EARTH PREVENTING ITS LOSS TO SPACE
C) undergoing exothermic reactions extensively in the atmosphere
D) increasing the index of refraction of the atmosphere
E) answer is not among the choices

Question 23

In times of severe cold, animals may hibernate for days or weeks at a time. Their body temperature drops, and they breathe only a few times in a minute. A hibernating animal uses the fat store in its body for nourishment. In times of severe heat, other animals may estivate. Just as with hibernating animals, the body function of estivating animals slow down almost to a stop. To an observer, the animal appears to be either in deep sleep or dead. What generalization could be accurately said about hibernation and estivation?

Answer 23

A) BOTH ARE RESPONSES TO EXTREME TEMPERATURES.
B) Both use more energy than when the animal is awake.
C) Both are responses to winter.
D) Both are responses to summer.
E) answer is not among the choices

Question 24

Suppose that you hold up a small convex mirror in front of your face. Which answer describes the image of your face?

Answer 24

A) VIRTUAL, UPRIGHT
B) real, inverted
C) virtual enlarged
D) real, reduced in size
E) answer is not among the choices

Question 25

Cathodic protection of a metal pipe against corrosion usually entails _________.

Answer 25

A) Attaching an active metal to make the pipe the anode in an electrochemical cell.
B) Coating the pipe with another metal whose standard reduction potential is less negative than that of the pipe.
C) ATTACHING AN ACTIVE METAL TO MAKE THE PIPE THE CATHODE IN AN ELECTROCHEMICAL CELL.
D) Coating the pipe with a fluoropolymer to act as a source of fluoride ion (since the latter is hard to oxidize).
E) answer is not among the choices

Question 26

Which one of the following statements is correct?

Answer 26

A) SEA LEVEL DROPS WHEN WATER IS STORED IN EXPANDING ICE SHEETS AND CONTINENTAL GLACIERS.
B) Sea level rises when water is added to the oceans through increased rainfall and increased inflow from the rivers.
C) Sea level drops when evaporation rates increase over the oceans and when this extra atmospheric moisture falls on land as rain.
D) Sea level rises when water is stored in expanding ice sheets and continental glaciers.
E) answer is not among the choices

Question 27

When the following equation is balanced, the sum of the coefficients is _____.

C8H8 + O2 = CO2 + H2O

Answer 27

A) 13
B) 31
C) 76
D) 61 (ANSWER)
E) answer is not among the choices

Question 28

Which of the following statements best describes erosion?

Answer 28

A) Disintegration and decomposition of rocks and minerals at the surface
B) Movement of weathered rock and regolith toward the base of a slope.
C) THE PROCESS BY WHICH WEATHERED ROCK AND MINERAL PARTICLES ARE REMOVED FROM ONE AREA AND TRANSPORTED ELSEWHERE
D) The combined processes of leaching, eluviation, and mass wasting
E) answer is not among the choices

Question 29

What stage in the meiosis do the paired homologous chromosomes line up along the equatorial plate?

Answer 29

A) Anaphase
B) Telophase
C) METAPHASE
D) Prophase
E) answer is not among the choices

Question 30

Which of the following statements correctly describes the Celsius and Kelvin temperature scales?

Answer 30

A) The size of the degree Celsius scale is larger than that on the Kelvin scale by a factor of 9/5.
B) Both scales assign the same temperature to the ice point but they assign different temperatures to the steam point.
C) The Celsius scale assigns the same temperature to the ice and steam points that the Kelvin scale assigns.
D) THE SIZE OF THE DEGREE ON EACH SCALE IS THE SAME.
E) answer is not among the choices