1) Dairy farming is _____ leading agricultural activity in the Unites States.

2) Although thunder and lightning are produced at the same time, light waves travel faster ____, so we see the lightning before we hear the under.

3) Beef cattle _____ of all livestock for economic growth in certain geographic regions.

4) The discovery of the halftone process in photography in 1881 made it _____ photographs in books and newspapers.

5) Flag Day is a legal holiday only in the state of Pennsylvania, _____ Betsy Ross sewed the first American flag.

6) The Hawaiian alphabet, introduced by missionaries in the 1820’s, _______ and only seven consonants.

7) Working like a telescope, _____ the size of objects at great distances

8) Volcanoes are divided into three main groups, based on their shape and the type of material they _____ .

9) ________ to inanimate objects, such as machines, is a form of animism.

10) _________, dolphins have no sense of smell.

11) In 1978 the united States National Air and Space Administration selected Sally Ride _________.the first woman astronaut.

12) Adhesions are _____ formed within the body in response to inflammation or injury.

13) The planet Neptune is about 30 times _____ from the Sun as Earth is.

14) Not until the 1850’s _____ a few public-spirited citizens and state legislatures seek to rescue historic buildings in the United States from destruction or alteration.

15) _____ 200 bones forming the framework, or skeleton, of the human body.