ACT Practice July 13

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

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,

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

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

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