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College Entrance Exam Revs > Science > Flashcards

Science Flashcards

(51 cards)

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1
Q
A
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2
Q

What is your net displacement if you walk 5 km due east and 2 km due west?

A

3 km due east

Net displacement is calculated by subtracting the distance traveled in the opposite direction from the total distance traveled in the initial direction.

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3
Q

You walk to the nearest store 2 km down the road and back. What is your total displacement?

A

0

Total displacement is zero when the starting and ending points are the same.

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4
Q

What happens to the gravitational force between two objects as the distance between them gets smaller?

A

Increases

Gravitational force is inversely proportional to the square of the distance between two masses.

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5
Q

What is the normal body temperature in degrees Fahrenheit?

A

98.6°F

The conversion from Celsius to Fahrenheit is done using the formula F = (C × 9/5) + 32.

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6
Q

The flow of internal energy from one object to another continues for as long as the two objects _______.

A

Have a difference in temperature

Heat transfer occurs until thermal equilibrium is reached.

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7
Q

An air conditioner cools a room through _______.

A

Convection

Convection involves the movement of air to transfer heat away from the room.

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8
Q

Which wave property depends on the medium?

A

Wave speed

Wave speed varies in different media due to differences in density and elasticity.

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9
Q

We can distinguish between the sound of a banjo and the sound of a guitar because they _______.

A

Differ in quality

Sound quality is determined by the harmonic content of the sound waves.

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10
Q

A virtual image is _______.

A

All of the above

Virtual images cannot be projected on a screen and are formed by the apparent divergence of rays.

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11
Q

Cells surrounded by a wall composed of cellulose belong to the Kingdom _______.

A

plantae

Cellulose is a key component of plant cell walls.

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12
Q

The scientific name for humans is correctly written as _______.

A

Homo sapiens

Scientific names are italicized, with the genus capitalized and the species in lowercase.

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13
Q

In general, predators _______.

A

decrease the number of prey in an area

This relationship is part of the predator-prey dynamics in ecosystems.

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14
Q

A photograph of all the chromosomes found in a cell is called a _______.

A

karyotype

Karyotyping is used to identify chromosomal abnormalities.

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15
Q

What is the sequence of the nitrogen bases on the other half of the DNA molecule if ACT is on one half?

A

TGA

DNA strands are complementary, following base pairing rules (A-T, C-G).

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16
Q

The inability to bear children after one year of trying is called _______.

A

infertility

Infertility can be caused by various factors affecting either partner.

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17
Q

The regrowth of lost body parts is known as _______.

A

regeneration

Regeneration occurs in some species and is a subject of biological research.

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18
Q

The fertilized egg is called a _______.

A

zygote

The zygote is the initial cell formed when a sperm cell fertilizes an egg cell.

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19
Q

The female gamete is called an _______.

A

egg

Eggs are produced in the ovaries and are essential for reproduction.

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20
Q

The male gonad is called the _______.

A

testes

The testes produce sperm and hormones like testosterone.

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21
Q

The tube that conveys sperm between the epididymis and the common bile duct is called the _______.

Study These Flashcards
A

vas deferens

The vas deferens is part of the male reproductive system.

22
Q

A person who has had the gallbladder removed may have difficulty in _______.

Study These Flashcards
A

digesting fats

The gallbladder stores bile, which helps in fat digestion.

23
Q

A homogeneous liquid that can be separated into its components by distillation is called a _______.

Study These Flashcards
A

mixture

Distillation separates components based on boiling points.

24
Q

Which factor does NOT affect the rate of chemical reaction?

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A

color of reactants

Factors affecting reaction rates include concentration, temperature, and surface area.

25
In the equation Fe₂O₃ + H₂O → Fe(OH)₃, the coefficient of H₂O to balance the equation is _______.
1 ## Footnote Balancing chemical equations requires equal numbers of each type of atom on both sides.
26
One of the conditions at STP is _______.
273K ## Footnote Standard Temperature and Pressure (STP) is defined as 0°C and 1 atm pressure.
27
Which is NOT a subsystem of the Earth?
chromosphere ## Footnote Earth's subsystems include the geosphere, hydrosphere, atmosphere, and biosphere.
28
These rocks are formed from pre-existing rocks exposed to high temperature and pressure.
metamorphic rocks ## Footnote Metamorphic rocks undergo transformation through metamorphism.
29
Chemical processes in nature that break rocks into smaller pieces are called _______.
insolation weathering ## Footnote Weathering is a natural process that contributes to soil formation.
30
Public storm Signal No. 3 means that winds greater than 100 km/hour may be expected in at least _______.
18 hours ## Footnote Storm signals help prepare for severe weather conditions.
31
It is the longest eon in Earth's history.
Phanerozoic eon ## Footnote The Phanerozoic eon is characterized by the abundance of fossil records.
32
Type of fossil where the entire animal or plant was trapped or preserved in ice, tar or other materials is called _______.
true form fossils ## Footnote True form fossils provide detailed information about ancient organisms.
33
Which of the following is equivalent to 0.020 m?
20 mm ## Footnote 1 meter equals 1000 millimeters.
34
A car that accelerates at -2 m/s² is _______.
Slowing down ## Footnote Negative acceleration indicates a decrease in speed.
35
Which of the following is not accelerating?
A boat travelling at a uniform speed of 12 knots ## Footnote Acceleration occurs when an object changes its speed or direction.
36
Weight is a measure of an object's _______.
Gravitational attraction to the Earth ## Footnote Weight is dependent on mass and the gravitational field strength.
37
A moving object can have potential energy. This statement is _______.
True ## Footnote Potential energy can exist in moving objects due to their height or position.
38
The law of heat exchange is another way of stating _______.
The law of conservation of energy ## Footnote Energy cannot be created or destroyed, only transformed.
39
When steam condenses, it _______.
Emits latent heat ## Footnote Latent heat is the energy released during phase changes.
40
If the mass of an object remains the same but its volume is doubled, then its density will _______.
Be reduced to half ## Footnote Density is defined as mass divided by volume.
41
It refers to parent cells found in the body of any organism that has the ability to divide indefinitely and give rise to specialized cells forming different tissues.
stem cell technology ## Footnote Stem cells have the potential to differentiate into various cell types.
42
What is the anticodon of the DNA sequence GGTACGGTA?
AATCGGCCA ## Footnote The anticodon corresponds to the complementary mRNA sequence.
43
The sex cells are called _______.
gametes ## Footnote Gametes include sperm and eggs, which are involved in reproduction.
44
The male gamete is called _______.
sperm ## Footnote Sperm are produced in the testes and are necessary for fertilization.
45
The release of an egg cell from an ovarian follicle is called _______.
ovulation ## Footnote Ovulation is a key event in the female reproductive cycle.
46
The narrow neck of the uterus is called the _______.
cervix ## Footnote The cervix plays a crucial role during childbirth and menstruation.
47
Which statement is not true about cardiac muscles?
it is attached to the rib cage ## Footnote Cardiac muscles are involuntary and are not directly attached to the rib cage.
48
A series of strong, rhythmic contractions of the uterus is called _______.
labor ## Footnote Labor involves contractions that help in the delivery of a baby.
49
Find the mass of Fe(OH)₃ that will be produced with 100 g of Fe₂O₃.
133.75g ## Footnote This calculation involves stoichiometry based on the balanced chemical equation.
50
Which is the limiting reactant in the reaction?
H₂O ## Footnote The limiting reactant determines the maximum amount of product that can be formed.
51
What is the percentage yield of the reaction?
93.46% ## Footnote Percentage yield is calculated by comparing the actual yield to the theoretical yield.

College Entrance Exam Revs (2 decks)

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