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Environmental Changes
Test Description: 5.9C
Instructions: Answer all questions to get your test result.
1) If humans over-hunted a population of insect-eating birds, what immediate change would likely be seen in the area
A
Severe loss of vegetation
B
Increased populations of insects
C
Migration of small mammals
D
Increased seedling germination
2) If humans cleared a forest and built homes where the forest once was, we would expect which of the following?
A
More development of soil
B
More frequent thunderstorms
C
Fewer tree-dwelling animals
D
Increased insect populations
3) If a factory polluted the water supply in an area, what change would likely be observed in that ecosystem?
A
New insects moving into the region
B
Fewer pond plants and animals
C
More birds nesting in trees
D
Local trees growing taller
4) Humans brought the first pigs to Hawaii more than 1,000 years ago. The pigs have no predators and eat nearly anything. Which of the following is a negative impact that might result from the introduction of pigs to the Hawaiian rainforest ecosystem?
A
More kinds of insect species
B
Less rainfall throughout the year
C
Fewer plants to hold soil in place
D
Increased destruction by volcanoes
5) During the construction of a mall, a lake was filled in. This would have the greatest negative effect on organisms that -
A
live in water
B
sleep in trees
C
burrow in soil
D
hunt for berries
6) An Oregon truffle is a type of fungus that grows underground in moist soil near fir trees and reproduces using spores instead of seeds. Which of the following environmental changes would likely cause a decrease in the truffle population in an area?
A
Counting and recording the number of truffles
B
More than average rain falling in the forest
C
Winds spreading the truffles’ spores all around
D
Cutting down the fir trees and planting crops
7) There are many large-mouth bass, a type of fish, living in a small lake near Waco, Texas. How would increased fishing in the lake effect the lake ecosystem?
A
The bass would spend more time swimming near the surface
B
Water level in the lake would decrease as more fishing took place
C
The population of the bass’ prey would decrease.
D
Predators of the bass might starve due to loss of a food source
8) The ecosystem of some dairy cows includes the fields in which they graze, eating the grass they need. Too many cows can be harmful to their ecosystem because they could -
A
raise the temperature
B
remove all the vegetation
C
produce too much milk
D
scare away predators
9) How could beavers building a dam cause an increase in fish population? The dam -
A
forces many birds to leave the ecosystem
B
causes predators to hunt more fish
C
blocks a river and creates a large lake
D
removes trees from around the river
10) Alligators are the large predators that eat many of the smaller animals in a swamp. How might removing the alligators from a swamp habitat create a decrease in vegetation?
A
More plant-eating animals would survive.
B
Plants would not be able to spread their seeds.
C
Meat-eating animals would begin eating plants.
D
The plants in the swamp would get more sunlight.
11) European rabbits were released into the Australian wild in 1859. They had no predators and found plenty of grasses, roots, fruit and seeds to eat. Rabbits likely impacted the Australian ecosystem in all of the following ways EXCEPT –
A
erosion of soil held in place by plants
B
fewer animals with a diet that includes plants
C
decrease in number and types of local plants
D
plants producing seeds faster
12) In a study of the habitat of a population of raccoons, scientists found that the number of raccoons actually increased where people built houses. What might the scientists conclude from this observation?
A
Building houses destroyed the raccoons’ habitat
B
The people brought many predators to the habitat
C
Raccoons found more food living near people
D
Raccoons lost their natural source of water
13) The surroundings where organisms live
A
Environment
B
Effect
C
Predict
D
Change
14) Things that happen as a result of an action
A
Organism
B
Predict
C
Envrionment
D
Effect
15) Living thing
A
Organim
B
Change
C
Envrionment
D
Predict
16) Tell or guess in advance
A
Organism
B
Change
C
Predict
D
Environment
17) To cause to become or to make different
A
Environment
B
Organism
C
Change
D
Predict
*select an answer for all questions
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