Grammar and Language Workbook

7. Reaching Barnard’s Star in fifty years or less now seems possible.
8. Plans for the mission include using robots.
9. The robots will be used for grabbing satellites and bringing them inside the shuttle for repair.
10. Studying the type of life support systems needed to live in space is Lon’s plan for the future.
11. Creating artificial gravity is only one problem already solved of the many potential problems.
12. Space colonies will have special areas for raising food crops.
13. Zero gravity conditions are good for producing some medicines and other products.
Unit 3, Phrases
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Grammar

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14. The National Aeronautics and Space Administration, or NASA, has responsibility for
exploring space for peaceful purposes.
15. Working with NASA is certain to become a reality for several of my classmates.
An 
appositive 
is a noun or pronoun that is placed next to another noun or pronoun to
identify it or give additional information about it.
My brother Frank has red hair. (Frank identifies brother.)
An 
appositive phrase
is an appositive plus any words that modify it. Commas should be
used to set off an appositive or appositive phrase that is not essential to the meaning of
the sentence.
Mrs. Robinson, a woman of humble origins, now owns a large retail chain. (A woman
of humble origins gives additional information about Mrs. Robinson. It is not essential
to the meaning of the sentence.)
 Exercise 2 
Underline each appositive and appositive phrase.
Robert H. Goddard, a pioneer in American rocketry, was first to use gasoline and liquid
oxygen instead of gunpowder as fuel.