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PRAXIS exam > Science > Flashcards

Science Flashcards

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1
Q

To apply the concept of time zones, students needs to have a clear understanding of

A

the concept of meridians of longitude

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2
Q

Which of the following is considered to be evidence for plate tectonics?

A

Continental coastline “fit
Identical fossil evidence at “fit” locations
Intense geological activity in mountainous regions

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3
Q

The Pacific Northwest receives the greatest annual precipitation in the continental United States. Which of the following statements best identifies the reason that this occurs?

A

The region’s mountain along the coast cause air masses to rise and cool, thereby reducing moisture-carrying capacity

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4
Q

The probability of a parents’ offspring showing particular traits can be predicted using

A

the Punnett Square

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5
Q

A material with definite volume but no definite shape is called

A

a liquid

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6
Q

The intensity of an earthquake is measured by a(n)

A

seismograph

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7
Q

Which of the following observations best describes a “Ring of Fire”?

A

Earth’s plates collide at convergent margins, separate at divergent margins, and move laterally at transform-fault boundaries

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8
Q

_________ is defined as the ability to work

A

Energy

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9
Q

The atomic number for neutral (unionized) atoms are listed in the period table refers to

A

The number of protons and electrons in an atom

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10
Q

Which of the following is a phenomenon involving physical properties of a substance?

A

melting of ice

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11
Q

Isotopes of a given element contain

A

equal number of proton and electrons with differing number of neutrons

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12
Q

Newton’s second law of motion states that “the net force acting on a body is equal to the product of its mass and its acceleration” Which of the following is a good example of the law’s application?

A

A rocket lifting off at Cape Canaveral with increasing speed

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13
Q

Which of the following is most likely to contain the greatest thermal energy?

A

The Pacific Ocean with an average temperature of ~5 degrees Fahrenheit

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14
Q

Which cellular component is responsible for the regulation of exchanges of substances between a cell and its environment?

A

the cell membrane

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15
Q

Humans have 46 chromosomes in their body cells. How many chromosomes are found in the zygote?

A

46

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16
Q

All of the following is true except:

A

Sections of the DNA molecule that determine specific traits are called chromosomes

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17
Q

Which of the following sources of energy is nonrenewable?

A

nuclear

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18
Q

Darwin’s original theory of natural selection asserts that:

A

all organisms have descended with modification from a common ancestor

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19
Q

The lunar period is nearest in length to:

A

30 days

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20
Q

A supernova normally occurs when:

A

the end of a star’s lifetime nears, with its nuclear fuel exhausted

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21
Q

The most important factor in Earth’s seasonal patterns is the

A

tilting of the Earth’s axis

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22
Q

Metamorphic rocks are:

A

derived from igneous rocks

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23
Q

Seafloor spreading is characterized by

A

plate spreading with upwelling magma forming ridges

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24
Q

Igneous rocks are formed by

A

magma cooling in underground cells and pockets

magma ejected above ground as lava, which cools

25
Q

Which of the following is the name of the cell formed by the union of a male sperm and a female ovum that develops into the embryo?

A

zygote

26
Q

A positive condition depending on the absence of cold is

A

heat

27
Q

A hot air balloon rises when propane burns in the basket are used to heat the air inside the balloon. Which of the following statements correctly identifies the explanation for this phenomenon?

A

The amount of empty space between gas molecules increases as the temperature of the as increases, resulting in the expansion of gas

28
Q

A rock picked up at the bottom of a hill was found to contain tiny pieces of seashells. Which of the following is the best explanation of how this rock was formed?

A

It was formed when sediments sank to the bottom of an ancient sea and were subjected to great pressure for longs period of time

29
Q

Earth’s moon is:

A

generally closer to the Earth than the sun

30
Q

Ms. Rosenberg writes these words on the chalkboard:
Igneous
Sedimentary
Metamorphic

A

geology

31
Q

A teacher takes a beaker of colored water and pours it from a long, slim vessel into a short, wide vessel. The teacher is illustrating the principle of

A

conservation

32
Q

The creation of wildlife refuges and the enforcement of game hunting laws are measures of

A

conservation

33
Q

Diagrams, tables, and graphs are used by scientists mainly to

A

organize data

34
Q

Mrs. Korenge is teaching a unit in ecology. She tells her class, “A new type of fuel gives of excessive amount of smoke” Before this type of fuel is used, an ecologist would most likely want to know

A

what effect will the smoke will have on the environment

35
Q

Which of the following isa cone-shaped formation one might find on the floor of a cave?

A

stalagmite

36
Q

Why do people “Gargle with salt water” when they suffer from sore throat?

A

increasing osmotic pressure

37
Q

Which of the following is not the direct result of volcanic activity?

A

Sedimentary rock

38
Q

Each population lives in a particular area and serves a special role in the community, which is known as its niche. For example, Sometimes one population replaces another in a niche. This occurrence is known as which of the following?

A

succession

39
Q

Which of the following characteristics of a sound wave represents a number of waves that pass through a given point each second?

A

frequency

40
Q

Producing and distributing chemicals that aid digestion, growth, and metabolism is known as

A

secretion

41
Q

The smallest possible uncharged unit of ordinary matter identifiable as an element is

A

atom

42
Q

Which of the following directs cell activities and holds DNA?

A

nucleus

43
Q

Photosynthesis (CO2+H2O –> glucose + oxygen) is a

A

reduction process in which hydrogen is reduced by a coenzyme

44
Q

If the concentration of CO2 in the atmosphere were significantly reduced, which of the following group of organisms would be affected the most in the short term?

A

Producers (plants)

45
Q

Sex linked traits in humans are usually the result of recessive alleles and are more often exhibited by males. By which of the following explain why males show these traits more than women?

A

sex linked traits are typically carried on the x-chromosome, and males have only one X-chromosome.

46
Q

For a stable population of organisms, that is, one that is neither growing or declining in size, which of the following are most likely equal?

A

birth rate and death rate

47
Q

The tendency of a plant to grow toward a light source is known as

A

phototropism

48
Q

Which of the following group of rocks is classified as sedimentary?

A

shale, sandstone, conglomerate

49
Q

Which of the following layers of Earth is the LEAST dense?

A

crust

50
Q

To an observer of Earth, it appears as if the sun orbits Earth once each day. Which of the following is responsible for this?

A

Earth’s rotation

51
Q

Which atmospheric layer includes the ozone layer, which absorbs and scatters solar ultraviolet radiation?

A

stratosphere

52
Q

According to the theory of plate tectonics, which statement is true?

A

Continents drift because they are part of the plates that moves

53
Q

Which of the following are most directly involved in the formation of chemical bonds?

A

electrons

54
Q

Which of the following wave characteristics best explains why sound can be heard around the corner from its source?

A

Diffraction

55
Q

Which statement about work is correct?

A

Work is a product of a force and the distance an object moves as a result of a force

56
Q

What would happen to the weight of an object on Earth if Earth’s mass doubled and Earth’s diameter remained the same?

A

It would increase because of the force of gravity on the object would increase

57
Q

Which of the following would be the same in both a muscle cell and a skin cell from the same organism?

A

DNA

58
Q

Which disease is caused by a virus?

A

smallpox

59
Q

Which of the following is used primarily by the human body for fuel during the first five minutes of intense exercise?

A

carbohydrates

PRAXIS exam (3 decks)

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