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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
More development of soil
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
Fewer pond plants and animals
B
Local trees growing taller
C
New insects moving into the region
D
More birds nesting in trees
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
Increased destruction by volcanoes
C
Fewer plants to hold soil in place
D
More kinds of insect species
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
Winds spreading the truffles’ spores all around
C
Cutting down the fir trees and planting crops
D
More than average rain falling in the forest
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
Predators of the bass might starve due to loss of a food source
B
Water level in the lake would decrease as more fishing took place
C
The population of the bass’ prey would decrease.
D
The bass would spend more time swimming near the surface
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
scare away predators
C
produce too much milk
D
remove all the vegetation
9) How could beavers building a dam cause an increase in fish population? The dam -
A
blocks a river and creates a large lake
B
causes predators to hunt more fish
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
The plants in the swamp would get more sunlight.
B
Plants would not be able to spread their seeds.
C
More plant-eating animals would survive.
D
Meat-eating animals would begin eating plants.
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
plants producing seeds faster
B
erosion of soil held in place by plants
C
decrease in number and types of local plants
D
fewer animals with a diet that includes plants
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
Predict
B
Effect
C
Environment
D
Change
14) Things that happen as a result of an action
A
Effect
B
Organism
C
Predict
D
Envrionment
15) Living thing
A
Predict
B
Envrionment
C
Organim
D
Change
16) Tell or guess in advance
A
Organism
B
Change
C
Predict
D
Environment
17) To cause to become or to make different
A
Organism
B
Change
C
Predict
D
Environment
*select an answer for all questions
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