1. Blood in vessels just under the nasal lining ………………up its heat to warm the air.

2. Parrots are noisy, sociable birds that live mainly chiefly in forested areas.

3…………………. forms of life, the most varied are the insects.

4. The shuttle, …………………………reusable spacecraft, lifts off like a rocket and lands like an airplane

5. The first American ……………………..a professional sculptor was a woman, Patience Lovell Wright

6. Tears not only …………………foreign substances from the eyes, but also contain chemicals that fight many common pathogens.

7. Carbonated beverages became popular in 1832 after ……………..an apparatus for charging water with carbon dioxide gas.

8. The Pawnee Indians regarded corn …………………..sacred gift, and many of their religious ceremonies are centered around this crop.

9. On Jupiter the winds have created storms ………………….big that astronomers on Earth can see them through their telescopes.

10. Larger animals …………………. than smaller animals of the same type.

11.The tails of comets generally point away from the sun ……………..the comet is approaching the sun or receding.

12. A desert is described as a region …………………an average of less than ten inches of rain falls in a year.

13. Regular radio broadcasting to inform and entertain the general public ………………….in the 1920s.

14……………………….was made of minute particles called corpuscles was believed by scientists.

15. …………………rain at all falls in the dry season in the savanna regions of Africa.

16. In a Rorschach test, the subject describes ………………..sees in a series of inkblots.

17. Pigeons, like many migratory birds, read the positions of the sun and stars in order to orient them.

18. The cracking of rocks is caused of intense heat during the day followed by rapid cooling at night.

19. Our nervous system has over ten billions nerve cells in a network covering every inch of our skin and organs.

20. Great quantities of the seaweed are found in the Sargasso Sea.

21. Giant tortoises live to great ages, and specimens have been known to live from 100 and 150 years.

22. Fermentation, the breaking down of simple sugars, produces either lactic theoretical alcoholic and carbon dioxide.

23. Most pines grow rapidly and form straight, tall trunks that are ideally lumber.

24. By measuring the color of a star, astronomers can tell how hot is it.

25. Many fruits contain large amounts of vitamin C, as well as sugar, which provide energy.

26. Valuable pearls come from some species of oysters and another mollusks that live in tropical seas

27. Freud’s ideas have had a great influence on the study of personality, but they are highly

controversy.

28.The Dodge brothers began doing their own automobiles in 1914, and produced one of the first American automobiles with an all-steel body.

29. Children’s ears are able to detect a wide variety of pitches than adults.

30. Glenna is a single-celled organism that has characteristic plants and animals

31. Morse code was an important way to send messages before the telephone and radio are

invented.

32. Many plains, such the Great Plains in the United States, have few trees because of dry or cold climates

33. Much psychologists do not associate themselves with a particular school or theory.

34. Prussia acid is one or the most poisonous substances known, neither as a liquid or a gas.

35. Compact discs, which appeared on the market in the early 1980s, produce sound of better quality than those of standard phonograph records

36. The Pony Express began at a time when not railway went farther west than the Mississippi and Missouri rivers.

37. The Homestead Act of 1862 granted 160 acres of land to any settler which would spend five years on the land.

38. Dust storms occur however wind erosion is strong and loose materials exposed.

39. Pewter ranks as one of the oldest known alloys and may have been used as early as 1500 B.C. ago.

40. Warm and moisture help microbes grow and thus assist the decay process