snowflakes form from tiny water droplets, following a specific process of chemical bonding as they freeze, which results in a six - sided figure. the rare riangular\ snowflake, similarly, confounded scientists for years because it apparently defied the basic laws of chemistry. a the seemingly triangular shape of those snowflakes suggests that forming through a different process of chemical bonding. b by re - creating snowflake formation, a discovery has revealed to scientists kenneth libbrecht and hannah arnold the cause of this apparent variation. 2 snowflakes begin to form when water in the atmosphere freezes it causes the water molecules to bond into a hexagonal shape. during the flake’s descent from earth’s upper atmosphere, other water vapor molecules bumps into the hexagonal structure. 1. a. no change b. form, from tiny, water droplets, c. form from tiny, water, droplets d. form, from tiny water droplets 2. f. no change g. for example, h. additionally, j. however, 3. a. no change b. the manner in which formation c. which had formed d. that they form 4. 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. 5. a. no change b. freezes, causing c. freezes, it causes d. freezes, this causes 6. f. no change g. has bumped h. bumped j. bump

Question

snowflakes form from tiny water droplets, following a specific process of chemical bonding as they freeze, which results in a six - sided figure. the rare 	riangular\ snowflake, similarly, confounded scientists for years because it apparently defied the basic laws of chemistry. a the seemingly triangular shape of those snowflakes suggests that forming through a different process of chemical bonding. b by re - creating snowflake formation, a discovery has revealed to scientists kenneth libbrecht and hannah arnold the cause of this apparent variation. 2 snowflakes begin to form when water in the atmosphere freezes it causes the water molecules to bond into a hexagonal shape. during the flake’s descent from earth’s upper atmosphere, other water vapor molecules bumps into the hexagonal structure. 1. a. no change b. form, from tiny, water droplets, c. form from tiny, water, droplets d. form, from tiny water droplets 2. f. no change g. for example, h. additionally, j. however, 3. a. no change b. the manner in which formation c. which had formed d. that they form 4. 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. 5. a. no change b. freezes, causing c. freezes, it causes d. freezes, this causes 6. f. no change g. has bumped h. bumped j. bump

Accepted Answer

### Question 1
# Brief Explanations:
We need to choose the correct punctuation and phrasing for the sentence "Snowflakes form from tiny water droplets, following...". Option A is the original, which is correct. Option B incorrectly adds commas (tiny, water droplets is wrong as "tiny water droplets" is a phrase). Option C adds commas in the wrong places (tiny, water, droplets). Option D adds an unnecessary comma after "form". So A is correct.
# Answer:
A. NO CHANGE

### Question 2
# Brief Explanations:
The sentence is about the rare triangular snowflake confounding scientists, which is an example of a snowflake that defied chemistry (after talking about normal six - sided ones). "Similarly" (original) doesn't fit as it's an example, not a similar situation. "For example" (G) is correct. "Additionally" (H) is for adding info, "however" (J) is for contrast.
# Answer:
G. for example,

### Question 3
# Brief Explanations:
The original "that forming" is incorrect. We need a clause. "that they form" (D) makes the sentence "suggests that they form through...", which is a correct subordinate clause. Option B is wordy, C is a relative clause that doesn't fit, A is incorrect.
# Answer:
D. that they form

### Question 4
# Brief Explanations:
The original sentence has a passive and awkward structure. Option H (scientists Kenneth Libbrecht and Hannah Arnold have discovered...) is active and clear. Option F is passive, G is also passive and wordy, J is passive. So H is correct (even with the cut - off, the structure is active and correct).
# Answer:
H. scientists Kenneth Libbrecht and Hannah Arnold have discovered the cause of this apparent variation

### Question 5
# Brief Explanations:
The original "freezes it causes" is a run - on. "freezes, causing" (B) is a participial phrase that correctly shows the result of the water freezing. Option C is still a run - on (two independent clauses with a comma), D is a run - on with "this causes". So B is correct.
# Answer:
B. freezes, causing

### Question 6
# Brief Explanations:
The subject is "water vapor molecules" (plural), so the verb should be plural. "bumps" (original, F) is singular. "bump" (J) is plural and correct. G is past tense, H is past tense, which don't fit the present - tense context of the passage.
# Answer:
J. bump

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