ACT English Practice

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

Tags

CCSS.L.11-12.1

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,

Tags

CCSS.L.11-12.4

CCSS.L.11-12.5

CCSS.RI.11-12.4

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

Tags

CCSS.L.11-12.1

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

Tags

CCSS.L.11-12.1

CCSS.L.11-12.2

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

Tags

CCSS.L.11-12.1

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

Tags

CCSS.L.11-12.1

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;

Tags

CCSS.L.11-12.1

CCSS.L.11-12.2

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

Tags

CCSS.L.11-12.4

CCSS.RI.11-12.4

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. The greater the pressure from the wind, causes bonds to form quick at this edge than in the rest of the snowflake.

• A. No change

• B. more quickly

• C. most quickly

• D. quickest

Tags

CCSS.L.11-12.4

CCSS.L.11-12.5

CCSS.RI.11-12.4