Using Commas to Set Off Appositives and Interrupters

In each of the following sentences, choose the appositives and interrupters that should be set off by commas.

For help with this exercise, see Chapter 28.

example

The exploration of outer space once strongly supported by the public is now less important to the average person.

a. exploration of outer space

b. once strongly supported by the public

c. now less important

d. to the average person

  1. Question

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    Using Commas to Set Off Appositives and Interrupters - In each of the following sentences, choose the appositives and interrupters that should be set off by commas.: Thousands of “snowballs” from outer space are hitting Earth’s atmosphere every day according to scientists at a recent meeting of the American Geophysical Union in Baltimore.

  2. Question

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    Using Commas to Set Off Appositives and Interrupters - In each of the following sentences, choose the appositives and interrupters that should be set off by commas.: Over billions of years they reported this bombardment of cosmic slush has added vast amounts of water to Earth’s atmosphere and oceans.

  3. Question

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    Using Commas to Set Off Appositives and Interrupters - In each of the following sentences, choose the appositives and interrupters that should be set off by commas.: These extraterrestrial snowballs made up of ice and cosmic dust may have played a key role in nurturing life on this planet and perhaps elsewhere in the solar system.

  4. Question

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    Using Commas to Set Off Appositives and Interrupters - In each of the following sentences, choose the appositives and interrupters that should be set off by commas.: They are about forty feet in diameter the size of a small house.

  5. Question

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    Using Commas to Set Off Appositives and Interrupters - In each of the following sentences, choose the appositives and interrupters that should be set off by commas.: These small, cometlike objects unlike large comets are extremely hard to see because they break up into fragments and then vaporize.

  6. Question

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    Using Commas to Set Off Appositives and Interrupters - In each of the following sentences, choose the appositives and interrupters that should be set off by commas.: Astronomers and physicists however have speculated about their existence since 1986.

  7. Question

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    Using Commas to Set Off Appositives and Interrupters - In each of the following sentences, choose the appositives and interrupters that should be set off by commas.: Dr. Louis A. Frank a physicist at the University of Iowa first theorized about them to explain the dark spots he observed in images of Earth’s sunlit atmosphere.

  8. Question

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    Using Commas to Set Off Appositives and Interrupters - In each of the following sentences, choose the appositives and interrupters that should be set off by commas.: Dr. Frank noticed these spots or atmospheric holes while analyzing data from NASA’s Dynamics Explorer 1 satellite.

  9. Question

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    Using Commas to Set Off Appositives and Interrupters - In each of the following sentences, choose the appositives and interrupters that should be set off by commas.: NASA’s Polar satellite a veteran space explorer produced more detailed images of these atmospheric holes.

  10. Question

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    Using Commas to Set Off Appositives and Interrupters - In each of the following sentences, choose the appositives and interrupters that should be set off by commas.: Many scientists now believe that these snowballs are hitting Earth’s outer atmosphere at an incredible rate of five to thirty a minute or up to 43,000 a day.