ACT Prep Exam (Correct Answers)
A Correct AnswersSnowflakes *form from tiny water droplets,* following a specific
process of chemical bonding as they freeze, which results in a six-sided figure.
A. No change
B. form, from tiny, water droplets,
C. form from tiny, water, droplets
D. form, from tiny water droplets
JCorrect AnswersThe rare "triangular" snowflake, *similarly,* confounded scientists for
years because it apparently defied the basic laws of chemistry.
F. No change
G. for example,
H. additionally,
J. however,
DCorrect AnswersThe seemingly triangular shape of those snowflakes suggests *that
forming* through a different process of chemical bonding.
A. No change
B. the manner in which formation
C. which had formed
D. that they form
HCorrect AnswersBy re-creating snowflake formation, *a discovery has revealed to
scientists Kenneth Libbrecht and Hannah Arnold the cause of this apparent variation.*
F. No change
G. the discovery of the cause of this apparent variation has been made by scientists
Kenneth Libbrecht and Hannah Arnold
H. scientists Kenneth Libbrecht and Hannah Arnold have discovered the cause of this
apparent variation.
J. the cause of this apparent variation has been discovered by scientists Kenneth
Libbrecht and Hannah Arnold
BCorrect AnswersSnowflakes begin to form when water in the atmosphere *freezes it
causes* the water molecules to bond into a hexagonal shape.
A. No change
B. freezes, causing
C. freezes, it causes
D. freezes, this causes
JCorrect AnswersDuring the flake's descent from Earth's upper atmosphere, other water
vapor molecules *bumps* into the hexagonal structure.
F. No change
G. has bumped
H. bumped
,J. bump
BCorrect Answers*Bypassing the liquid water phase*, those molecules condense
directly onto the established hexagonal pattern. As a result, the flake grows outward into
bigger and more complex hexagonal arrangements surrounding the original hexagonal
shape at the center of the flake.
If the writer were to delete the * * portion (adjusting the capitalization as needed), the
sentence could primarily lose:
A. an explanation of the process water molecules undergo to change from liquid to
vapor to solid.
B. a detail that mentions a step some water molecules skip in changing from vapor to
solid.
C. a visual description of what water vapor molecules look like.
D. an explanation of how molecules react to various air temperatures.
JCorrect AnswersIn 2009, Libbrecht and Arnold's experiments revealed that triangular
snowflakes begin with the same process of chemical bonding and *forms* a hexagonal
shape.
F. No change
G. were they to form
H. if they formed
J. form
CCorrect AnswersThe triangular shape is an illusion resulting from one significant
addition to the *process* dust.
A. No change
B. process is
C. process:
D. process;
J and BCorrect AnswersTriangular snowflakes begin to form when a tiny dust particle or
other such impurity collides with the flake as it falls, thereby pushing one edge upward.
The greater *the pressure from the wind,* causes bonds to form *quick* at this edge
than in the rest of the snowflake.
F. No change
G. pressure from the wind, which
H. the pressure, as the wind
J. pressure from the wind
A. No change
B. more quickly
C. most quickly
D. quickest
,GCorrect AnswersThe resulting snowflake has three long sides and three sides that are
so short they are difficult to detect. Although these snowflakes appear to have a
triangular *shape--*they actually have a hexagonal pattern.
F. No change
G. shape,
H. shape;
J. shape:
ACorrect AnswersSuch snowflakes offer evidence that even when impurities interfere,
*the basic laws of chemistry still apply.*
Which choice most effectively concludes the sentence and the essay?
A. No change
B. scientists can be certain that a solution to even the most confusing event will be
found
C. snowflakes will still fall if atmospheric conditions are favorable.
D. snowflakes come in many different shapes and sizes.
HCorrect AnswersBundled up in wool sweaters and thick *coats, and we watched* the
sun setting on Mt. Fuji in Japan.
F. No change
G. coats while watching
H. coats, we watched
J. coats watching
BCorrect AnswersIt was August and our clothes were stifling, but we *would have
needed* the warmth from our bodies sealed around us as we hiked into the high
altitudes.
A. No change
B. would need
C. will need
D. need
JCorrect AnswersThe trail gradually changed from compact dirt to a jumble of volcanic
rocks. We tried to steady ourselves with our walking sticks but slipped and stumbled
*because of the jumbled rocks we were slipping on.*
F. No change
G. even though we used our walking sticks.
H. despite any efforts to remain steady.
J. with each step.
CCorrect AnswersEvery thousand feet, we came to a small station constructed of tin
and cement, barely able to block the wind. At each one, we noted the roof *piled high
on* fallen rocks and felt both unsettled and reassured by this evidence of the station's
protective ability.
, A. No change
B. piling high with
C. piled high with
D. piling high on
HCorrect AnswersWe rested uneasily for a moment as a clerk burned the station brand
into our walking *sticks which it was proof of* our progress through the darkness.
F. No change
G. sticks, it was proof of
H. sticks, proof of
J. sticks proved
ACorrect AnswersAs we neared the summit, the whole group of hikers--thinly spread
across the mountain for *most* of the route--condensed, forming an illuminated line
along the trail.
A. No change
B. the most part
C. majority
D. more
FCorrect AnswersAs we neared the summit, the whole group of hikers--thinly spread
across the mountain for most of the route--condensed, *forming* an illuminated line
along the trail.
F. No change
G. they formed
H. there was
J. we saw
BCorrect AnswersOur pace slowed. *Progressing along the trail,* we reached the
summit jus five minutes before dawn.
Which choice emphasizes the slowness of the ascent and supports the idea that the
narrator's group of friends did not set their own pace?
A. No change
B. Able to advance only a few steps at a time,
C. Moving forward with each step,
D. Climbing higher in altitude
H and CCorrect AnswersIn the half-light of the rising *sun:* we began to make out the
dark lines of the *cliffs' at the crater's* edge.
F. No change
G. sun--
H. sun,
J. sun;
A. No change
A Correct AnswersSnowflakes *form from tiny water droplets,* following a specific
process of chemical bonding as they freeze, which results in a six-sided figure.
A. No change
B. form, from tiny, water droplets,
C. form from tiny, water, droplets
D. form, from tiny water droplets
JCorrect AnswersThe rare "triangular" snowflake, *similarly,* confounded scientists for
years because it apparently defied the basic laws of chemistry.
F. No change
G. for example,
H. additionally,
J. however,
DCorrect AnswersThe seemingly triangular shape of those snowflakes suggests *that
forming* through a different process of chemical bonding.
A. No change
B. the manner in which formation
C. which had formed
D. that they form
HCorrect AnswersBy re-creating snowflake formation, *a discovery has revealed to
scientists Kenneth Libbrecht and Hannah Arnold the cause of this apparent variation.*
F. No change
G. the discovery of the cause of this apparent variation has been made by scientists
Kenneth Libbrecht and Hannah Arnold
H. scientists Kenneth Libbrecht and Hannah Arnold have discovered the cause of this
apparent variation.
J. the cause of this apparent variation has been discovered by scientists Kenneth
Libbrecht and Hannah Arnold
BCorrect AnswersSnowflakes begin to form when water in the atmosphere *freezes it
causes* the water molecules to bond into a hexagonal shape.
A. No change
B. freezes, causing
C. freezes, it causes
D. freezes, this causes
JCorrect AnswersDuring the flake's descent from Earth's upper atmosphere, other water
vapor molecules *bumps* into the hexagonal structure.
F. No change
G. has bumped
H. bumped
,J. bump
BCorrect Answers*Bypassing the liquid water phase*, those molecules condense
directly onto the established hexagonal pattern. As a result, the flake grows outward into
bigger and more complex hexagonal arrangements surrounding the original hexagonal
shape at the center of the flake.
If the writer were to delete the * * portion (adjusting the capitalization as needed), the
sentence could primarily lose:
A. an explanation of the process water molecules undergo to change from liquid to
vapor to solid.
B. a detail that mentions a step some water molecules skip in changing from vapor to
solid.
C. a visual description of what water vapor molecules look like.
D. an explanation of how molecules react to various air temperatures.
JCorrect AnswersIn 2009, Libbrecht and Arnold's experiments revealed that triangular
snowflakes begin with the same process of chemical bonding and *forms* a hexagonal
shape.
F. No change
G. were they to form
H. if they formed
J. form
CCorrect AnswersThe triangular shape is an illusion resulting from one significant
addition to the *process* dust.
A. No change
B. process is
C. process:
D. process;
J and BCorrect AnswersTriangular snowflakes begin to form when a tiny dust particle or
other such impurity collides with the flake as it falls, thereby pushing one edge upward.
The greater *the pressure from the wind,* causes bonds to form *quick* at this edge
than in the rest of the snowflake.
F. No change
G. pressure from the wind, which
H. the pressure, as the wind
J. pressure from the wind
A. No change
B. more quickly
C. most quickly
D. quickest
,GCorrect AnswersThe resulting snowflake has three long sides and three sides that are
so short they are difficult to detect. Although these snowflakes appear to have a
triangular *shape--*they actually have a hexagonal pattern.
F. No change
G. shape,
H. shape;
J. shape:
ACorrect AnswersSuch snowflakes offer evidence that even when impurities interfere,
*the basic laws of chemistry still apply.*
Which choice most effectively concludes the sentence and the essay?
A. No change
B. scientists can be certain that a solution to even the most confusing event will be
found
C. snowflakes will still fall if atmospheric conditions are favorable.
D. snowflakes come in many different shapes and sizes.
HCorrect AnswersBundled up in wool sweaters and thick *coats, and we watched* the
sun setting on Mt. Fuji in Japan.
F. No change
G. coats while watching
H. coats, we watched
J. coats watching
BCorrect AnswersIt was August and our clothes were stifling, but we *would have
needed* the warmth from our bodies sealed around us as we hiked into the high
altitudes.
A. No change
B. would need
C. will need
D. need
JCorrect AnswersThe trail gradually changed from compact dirt to a jumble of volcanic
rocks. We tried to steady ourselves with our walking sticks but slipped and stumbled
*because of the jumbled rocks we were slipping on.*
F. No change
G. even though we used our walking sticks.
H. despite any efforts to remain steady.
J. with each step.
CCorrect AnswersEvery thousand feet, we came to a small station constructed of tin
and cement, barely able to block the wind. At each one, we noted the roof *piled high
on* fallen rocks and felt both unsettled and reassured by this evidence of the station's
protective ability.
, A. No change
B. piling high with
C. piled high with
D. piling high on
HCorrect AnswersWe rested uneasily for a moment as a clerk burned the station brand
into our walking *sticks which it was proof of* our progress through the darkness.
F. No change
G. sticks, it was proof of
H. sticks, proof of
J. sticks proved
ACorrect AnswersAs we neared the summit, the whole group of hikers--thinly spread
across the mountain for *most* of the route--condensed, forming an illuminated line
along the trail.
A. No change
B. the most part
C. majority
D. more
FCorrect AnswersAs we neared the summit, the whole group of hikers--thinly spread
across the mountain for most of the route--condensed, *forming* an illuminated line
along the trail.
F. No change
G. they formed
H. there was
J. we saw
BCorrect AnswersOur pace slowed. *Progressing along the trail,* we reached the
summit jus five minutes before dawn.
Which choice emphasizes the slowness of the ascent and supports the idea that the
narrator's group of friends did not set their own pace?
A. No change
B. Able to advance only a few steps at a time,
C. Moving forward with each step,
D. Climbing higher in altitude
H and CCorrect AnswersIn the half-light of the rising *sun:* we began to make out the
dark lines of the *cliffs' at the crater's* edge.
F. No change
G. sun--
H. sun,
J. sun;
A. No change
