2nd six weeks exam review

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2nd six weeks exam review

• Questions by T. Shorter
• PowerPoint by K. Pease
• 7th grade Science

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1. Describe each of the following biomes and the
organisms that are able to survive there.
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1 A Desert

• Very hot in day / cold at night, dry climate,
  sand, platues, mesa
• Little to no rainfall
• Animals snakes, lizards, coyotes, jackrabbits,
  road runners, insects, birds
• Plants cactus, tumble weeds, junipers, low
  shrubs
• Adaptation
• Dry, rough skin
• Water storage
• Nocturnal
• Eat plants to consume water

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1 B Taiga

• Cold, High latitudes (mountains)
• Coniferous Forest
• Little Rainfall
• Rain deer, Mice
• Snowshoe rabbits
• Wolverines
• Adaptations
• Thick fur, color change with seasons
• Hibernation
• Migration

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1 C Tundra

• Very cold
• Perma-frost
• Polar Bears, seals, reindeer

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1 D Rainforest

• Very Hot
• Wet
• Largest form of biodiversity
• Monkeys, parrots, gibbons
• Orchids, tall trees

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2. Which one of the biomes above has the most
biodiversity?

• Rainforest

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3. Explain how hibernation helps an organism to
survive?

• To avoid the sever cold of winter
• To conserve energy during limited food supply

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4. Explain how migration helps an organism to
survive?

• To avoid starvation due to limited food
• Avoid undesirable climate
• Instinctive

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5. List and describe three external features that
an organism can have to increase its chances of
survival?

• Camouflage (skin coloring)
• Ability to flee from predators
• Ability to catch prey

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6. What adaptations enable birds to fly?

• Hollow bones
• Feathers
• Stream line body

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7. Describe how vegetation (plant life) might be
affected by a drought.

• It will wilt from lack of water, then it will die

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8. Describe how Hurricane Ike impacted the Gulf
Coast Ecosystem.

• Destroyed large amounts of habitats, land
• Polluted water
• Left people / animals without homes

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9. Describe how each of the following would
affect our ecosystem
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9 A Earthquake

• Destroyed large amounts of habitats, land
• Polluted water
• Left people / animals without homes

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9 B Flood

• Destroyed large amounts of habitats, land
• Polluted water
• Left people / animals without homes

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9 C Volcanic Eruption

• Destroyed large amounts of habitats, land
• Polluted water
• Left people / animals without homes

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10. Explain the difference between primary
succession and secondary succession.

• Primary no soil present
• Secondary past soil is present

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11. Is the picture below an example of Primary or
Secondary succession? Why?

• Primary because it starts with bare rock, no soil
  is present

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What types of organisms would be considered
pioneer species?

• Lichens
• Ferns
• mosses

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13. What is the final stage of succession?

• Climax Community

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14. List the 5 agents of erosion that most
commonly impact Texas eco-regions and give an
example of a landform that can be created as a
result of each.
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• A.
• B.
• C.
• D.
• E.

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15.________, __________, and ___________ work
together causing the Earth to be broken down in
one place and built up in another place.

• Weathering
• Erosion
• Deposition

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16. ________ process by which natural forces move
weathered rock and soil from one place to
another.

• Erosion

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17. Differentiate between mechanical and
chemical weathering.

• Mechanical changes the appearance of the rock
• Chemical forms a new substance

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18. _________ is material moved by erosion.

• Deposition

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19. ________ water that moves over the Earths
surface carries sediments with causing erosion.

• runoff

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20. When it rains some of the water goes
underground this water is now called
_______________.

• groundwater

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21. _________ the process by which sediment is
laid down in a new location.

• deposition

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22.Which of the above, surface water or
groundwater, will be most affected by the leaking
storage tank?(see handout for picture)

• Ground water

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23. If the grass and trees were removed to build
more buildings and streets, how would the water
in the water table be affected?

• It would go down

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24. How might overuse of water wells affect the
groundwater and surface water in a watershed
region?

• Texas water costs will rise, land could subside,
  water quality could decline and people in some
  areas could run out of water.

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25. During the summer months, people fertilize
and water in lawns. How do these activites affect
the surface water and ground water?

• Fertilizers, Pesticides, and Herbicides If these
  are applied excessively or improperly,
  fertilizers, pesticides, and herbicides can be
  carried by rain waters from the green parts of
  public rights-of-way. In rivers, streams, lakes,
  and bays, fertilizers contribute to algal blooms
  and excessive plant growth, and can lead to
  eutrophication. Pesticides and herbicides can be
  harmful to human and aquatic life.