Question

bypassing the liquid water phase, these 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. c
3

in 2009, libbrecht and arnold’s experiments
revealed that triangular snowflakes begin with the
same process of chemical bonding and forms a hexagonal
shape. the triangular shape is an illusion resulting from
one significant addition to the process dust.
4

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. d
the downward edge of the snowflake encounters more
wind resistance than the rest of the flake. the greater
the pressure from the wind, causes bonds to form
10

quick at this edge than in the rest of the snowflake.
11
5

the 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. such
snowflakes offer evidence that even when impurities
interfere, the basic laws of chemistry still apply.
13

1. if the writer were to delete the underlined (adjusting the capitalization as needed), the sentence would 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.

1. f. no change

g. were they to form
h. if they formed
j. form

1. a. no change

b. process is
c. process:
d. process;

1. f. no change

g. pressure from the wind, which
h. the pressure, as the wind
j. pressure from the wind

1. a. no change

b. more quickly
c. most quickly
d. quickest

1. f. no change

g. shape,
h. shape;
j. shape:

1. 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.

Explanation:

Question 7

The underlined part is "adjusting the capitalization as needed" (wait, no, the original underlined part in the context is about the process where molecules condense directly (skipping liquid phase) to solid. So deleting that part would remove the detail about some water molecules skipping the liquid phase (changing from vapor to solid directly). Option B says a detail about a step some water molecules skip in changing from vapor to solid. So the answer is B.

The original sentence is "begin with the same process of chemical bonding and forms a hexagonal shape". The subject is "triangular snowflakes", plural, so the verb should be "form" (plural verb). So "form" (J) is correct.

The sentence is "one significant addition to the process dust". We need a colon to introduce the explanation of the "addition" (dust is the addition to the process). So "process: " (C) is correct.

Answer:

B. a detail that mentions a step some water molecules skip in changing from vapor to solid

Question 8