8^th Grade Science Biodiversity Name:

Matching:

A. Biodiversity B. Fluorocarbons

C. Extinction D. Succession

E. Monoculture F. Herbivore

G. Carnivore H. Species

___ 1. An animal that eats mostly other animals.

___ 2. Compound of carbon and fluorine that destroys ozone.

___ 3. Group of genetically related organisms that can successfully breed.

___ 4. Large area that people have planted in one species.

___ 5. Condition when all members of a species are dead.

___ 6. Richness in number and variety of species in an area.

___ 7. An animal that eats plants almost exclusively.

___ 8. Groups of species which replace each other in an area.

TRUE or FALSE

___ 9. All plants only produce food for animals to eat.

___ 10. Too many nutrients in sewage can become an environmental problem.

___ 11. All plants bloom when the day length is longest.

___ 12. No amount of light pollution can keep the stars from being seen.

___ 13. Some drugs can pass through the human body and reappear in the water supply.

___ 14. Larger mammals were going extinct before modern man appeared.

15. Major tropical crops, such as bananas and manioc:

(a) do not grow well in cold climates (c) are high in starch

(b) are low in protein (d) all of these

16. The single most important crop in the world is __________________________.

17. All the top 4 food crops are: (a) grains (b) root crops (c) tropical

18. What we know in the USA as corn, the rest of the world calls: (a) maize (b) corn (c) barley (d) wheat

19. Which crop is planted on the most U.S. farmland? (a) Rice (b) Wheat (c) Barley (d) Corn

20. An archeologist is examining the skull of an ancient person who lived to be over fifty years old. If this person was from a grain-producing agrarian culture, the teeth will most likely be;

(a) perfectly formed (b) extremely worn down (c) cracked open

21. A minor grain would be: (a) rice (b) wheat (c) millet

22. Farming and domestication of plants began about how long ago?

(a) 300 years ago (b) 2000 years ago (c) 10,000 years ago (d) 1 million years ago

23. The majority of landfill wastes in the USA comes from: (a) factories (b) households

24. Sunlight helps the human skin make: (a) Vitamin A (c) Vitamin C

(b) Folic Acid (d) Vitamin D

25. Name one way in which fire can help a forest:

26. Name 3 of the top ten food crops of the world:

Refer to the illustration to answer 27, 28, and 29.

27. The primary producers are all:

(a) herbivores

(b) carnivores

(c) plants

28. Which is a secondary consumer (carnivore)?

(a) fox

(b) mouse

(c) clover

29. Which should be the greater in numbers?

(a) Second feeding level (b) Third feeding level

30. The first plants on a piece of newly cleared ground (whether done by man or nature) will be:

(a) short weedy plants (b) pines (c) hardwoods

31. In Mississippi, pines tend to grow on ___ and hardwoods in wetter low areas.

(a) creek bottoms (b) microdeserts (c) hilltops

32. Essay. Answer in complete paragraphs. NOT OPTIONAL, you must answer this one.

(7 points; everything else is 3 points each)

During the Arctic winter in north Alaska, not only is it very cold, but it is also very dark. Days are shorter than four hours and, for a few days, the sun does not come up at all! What are some of the advantages (you must give at least one) to having such a long dark period? What are some of the disadvantages?