Scientists determined how the canyon was formed by ___________ the rock layers.

Many diseases _____________ through diet and exercise.

People ___________ in an earthquake zone should have anescape plan.

They are studying _____________ the locations of early cities affected trade.

Charlotte Brontë is the British novelist ____________ wrote Jane Eyre.

Directions: One underlined phrase has an error. Find it and write the correction below. Water and wind erosion may have caused the Grand Canyon to form. In addition, the course of the Colorado River could have lead to its formation.

_______________ enough food, the farmers began to do other work.

Most people are opposed ___________ to more taxes.

People who only read one news source ______________ only get one view of current events.

Directions: One underlined phrase has an error. Find it and write the correction below. The Mayans learned about astronomy by watch the movements of the sun, moon, and stars. They developed calendar systems to predict eclipses.