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1 / 40

The Arctic Circle …… through northern North America, Europe and Asia.

2 / 40

Earth’s gravity pulls everything toward …… the Earth.

3 / 40

The forces ….. earthquakes are the same ones that build mountains.

4 / 40

Since the eighteenth century, ….. the major genre of literature in most literate societies.

5 / 40

Under a microscope, ….. of a computer chip looks like a network of aluminum tracks.

6 / 40

Dinosaurs became extinct 64 million years ….. first people ever appeared on Earth.

7 / 40

Venus is almost the same size as the Earth, ….. mountain ranges are much higher.

8 / 40

In concrete poetry the primary consideration is the way that ….. in the poem.

9 / 40

Scientists are now only beginning to understand the factors ….. cigarette addictions.

10 / 40

Agricultural ….. largely responsible for the unfolding of nutritional knowledge of vitamins and minerals early in the last century.

11 / 40

Each summer the Roanoke Historical Association sponsors a play that shows ….. about the fate of the early colony.

12 / 40

Agriculture requires a steady supply of water to keep the plants alive, so ….. in areas with a lot of rainfall.

13 / 40

Even though ….. about $4,000 to fully train a hearing dog, these dogs are generally given without charge to qualified candidates.

14 / 40

The reactor core of a nuclear reactor is housed in a steel vessel ….. by a thick layer of concrete.

15 / 40

Kansas ….. at the geographical center of the United States.

16 / 40

Polar winters are length, dark, and cold enough to kill  plants.

17 / 40

The remains of very ancient wood have turn into coal.

18 / 40

In 1893, Henry Ford built his first car engine in he home workshop in Detroit.

19 / 40

Armies of laborers toiled for eight year to build the Erie Canal.

20 / 40

Some of the stars in the closing stages of their lives becomes while dwarfs.

21 / 40

The normally force of gravity at the Earth’s surface is called 1G.

22 / 40

Edward McDowell is remember as the composer of such perennial favorites as “To a Wild Rose”.

23 / 40

Because he is gravitationally bound to the Milky Way, the Andromeda galaxy is currently approaching Earth.

24 / 40

CAT scanners are used not only for detecting conditions but also for observation the effects of therapy.

25 / 40

The chain of rider stations along the way were crucial to the success of the Pony Express.

26 / 40

The functional relationship between the brain’s two hemispheres has been a major focus of much studies in neuropsychology.

27 / 40

The Great Salt Lake is the remnant of a vast inland seas.

28 / 40

A desire to eradicate irregular spellings in English can being traced back to the sixteenth century.

29 / 40

Jade can actually refer to either the less valuable jadeite and the more common nephrite.

30 / 40

The number of electrons in an atom match the number of charged particles, or protons.

31 / 40

When someone take a depressant, the level of activity in the central nervous system is lowered.

32 / 40

During their first attempts as a songwriter, George Gershwin diligently continued to study the piano, harmony, theory, and orchestration.

33 / 40

Alexander Graham Bell was twenty-nine when him was granted a telephone patent in 1876.

34 / 40

The world’s largest deposits of asbestos have be located in the Appalachian Mountains.

35 / 40

A huge amount of immigrants passed through the Great Hall on Ellis Island between 1892 and 1954.

36 / 40

The cliff dwellings in Mesa Verde were build in the thirteenth century by Native Americans who farmed the green plateau.

37 / 40

The poet Wall Whitman were an easily recognized figure with his long, white beard and wide-brimmed hat.

38 / 40

The sand dollars are a distinctive group of sea urchins that have adapt especially to lie on sandy shores.

39 / 40

Someone who personifies the “American Dream” are Andrew Carnegie, who immigrated to the United States from Scotland without money and made millions in the steel industry.

40 / 40

The Nez Perce lived peacefully with the trappers and traders who traveled theirs lands until the discovery of gold in 1860 brought miners and settlers into region.

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