,A - ANSWER-Snowflakes *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
QUESTION: J - ANSWER-The 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,
QUESTION: D - ANSWER-The 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
QUESTION: H - ANSWER-By 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
QUESTION: B - ANSWER-Snowflakes 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
QUESTION: J - ANSWER-During 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
QUESTION: B - ANSWER-*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.
QUESTION: J - ANSWER-In 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
QUESTION: C - ANSWER-The triangular shape is an illusion resulting from one significant addition to the
*process* dust.
A. No change
B. process is
C. process:
D. process;
QUESTION: J and B - ANSWER-Triangular 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
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
QUESTION: J - ANSWER-The 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,
QUESTION: D - ANSWER-The 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
QUESTION: H - ANSWER-By 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
QUESTION: B - ANSWER-Snowflakes 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
QUESTION: J - ANSWER-During 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
QUESTION: B - ANSWER-*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.
QUESTION: J - ANSWER-In 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
QUESTION: C - ANSWER-The triangular shape is an illusion resulting from one significant addition to the
*process* dust.
A. No change
B. process is
C. process:
D. process;
QUESTION: J and B - ANSWER-Triangular 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
