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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
Migration of small mammals
B
Severe loss of vegetation
C
Increased seedling germination
D
Increased populations of insects
2) If humans cleared a forest and built homes where the forest once was, we would expect which of the following?
A
More frequent thunderstorms
B
Increased insect populations
C
Fewer tree-dwelling animals
D
More development of soil
3) If a factory polluted the water supply in an area, what change would likely be observed in that ecosystem?
A
Local trees growing taller
B
Fewer pond plants and animals
C
More birds nesting in trees
D
New insects moving into the region
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
Less rainfall throughout the year
B
More kinds of insect species
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
burrow in soil
B
live in water
C
hunt for berries
D
sleep in trees
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
Cutting down the fir trees and planting crops
B
More than average rain falling in the forest
C
Counting and recording the number of truffles
D
Winds spreading the truffles’ spores all around
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
Water level in the lake would decrease as more fishing took place
B
The bass would spend more time swimming near the surface
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
remove all the vegetation
B
raise the temperature
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
causes predators to hunt more fish
B
blocks a river and creates a large lake
C
removes trees from around the river
D
forces many birds to leave the ecosystem
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
Meat-eating animals would begin eating plants.
B
More plant-eating animals would survive.
C
Plants would not be able to spread their seeds.
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
decrease in number and types of local plants
B
erosion of soil held in place by plants
C
fewer animals with a diet that includes 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
Raccoons found more food living near people
B
The people brought many predators to the habitat
C
Raccoons lost their natural source of water
D
Building houses destroyed the raccoons’ habitat
13) The surroundings where organisms live
A
Effect
B
Predict
C
Change
D
Environment
14) Things that happen as a result of an action
A
Envrionment
B
Predict
C
Effect
D
Organism
15) Living thing
A
Change
B
Predict
C
Organim
D
Envrionment
16) Tell or guess in advance
A
Environment
B
Change
C
Predict
D
Organism
17) To cause to become or to make different
A
Organism
B
Environment
C
Change
D
Predict
*select an answer for all questions
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