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7.8A Catastrophic Events
Test Description: Catastrophic Events
Instructions: Answer all questions to get your test result.
1) A forest fire can have which of the following positive effects?
A
Drives away predators that eat smaller animals.
B
Increases annual rainfall by forming more clouds.
C
Provides heat mammals need in colder seasons.
D
Clears underbrush to allow new plants to grow.
2) Which of the following is an example of how flooding can impact ecosystems?
A
Increasing the nutrients in the soil.
B
Preventing plants from photosynthesizing.
C
Burial and uprooting of plants.
D
Removing the leaves from tall trees.
3) Which catastrophic event would most likely result in trees being knocked over and the disappearance of most of the plants and animals along a narrow path in a forest ecosystem?
A
A tornado
B
A flash flood
C
A volcanic eruption
D
An earthquake
4) Hurricanes can harm plants in coastal ecosystems in all of the following ways EXCEPT...
A
high winds knocking down tall trees
B
soil washing away due to high water
C
storm surge moving saltwater onto land
D
clouds blocking the Sun for too long
5) Which of the following is the most likely effect of flooding on an ecosystem?
A
Fish that feed on plants will have to compete more.
B
Increase in organisms that reproduce in freshwater.
C
Nutrients will increase in deeper layers of the soil.
D
More rapid growth of grasses and shrubs.
6) Tornadoes can negatively affect an ecosystem when...
A
the rise in water level they produce introduces harmful salt.
B
they bring higher temperatures favored by birds.
C
their strong winds uproot many of the important plants.
D
the saltwater they bring kills off burrowing insects.
7) In a marsh ecosystem that experiences a hurricane, which of the following would be the most likely effect?
A
More burrowing animals living in the deeper soil layers.
B
Death of most organisms due to fires from lightning strikes.
C
Increase in diversity of organisms due to more competition.
D
A loss of plant life from saltwater brought in by storm surge.
8) If a tornado uproots most of the trees in an ecosystem, it could be expected that, due to the loss of the trees, there will be a reduction in...
A
soil
B
precipitation
C
oxygen
D
sunlight
9) Tornadoes can be more damaging than a hurricane to trees in a habitat because tornadoes produce...
A
stronger winds
B
higher flooding
C
more rain
D
thicker clouds
10) Which of the following correctly matches a catastrophic weather event with its effects on an ecosystem?
A
A hurricane can kill off plants in deep water.
B
A tornado can move a lot of seawater onto land.
C
A flood can damage plants with high winds
D
A thunderstorm's lightning can start forest fires.
11) How is a tornado different from a hurricane?
A
A tornado is much smaller.
B
A tornado has higher speed winds.
C
Hurricanes do not impact life on land.
D
A tornado brings more rain.
12) What impact does a tornado have on an ecosystem?
A
The land becomes saturated and cannot absorb water fast enough.
B
Large amounts of salt water mix with fresh water, killing huge numbers of fish.
C
Mud and soil are deposited in different areas, trapping animals and plants underneath.
D
It can uproot trees, wipe out vegetation and animals, and destroy everything in its path.
13) How do hurricanes affect aquatic ecosystems?
A
Barrier islands are shifted or completely eroded away, leaving the coast unprotected.
B
Plants and animals are washed upstream.
C
Saltwater can flood freshwater habitats, killing large numbers of fish.
D
Trees, shrubs, and other vegetation can be uprooted.
14) The term catastrophic means...
A
aquatic
B
draining
C
natural ecosystem
D
extremely harmful
15) A flood will have a greater effect on a habitat than a heavy rainfall event because a flood...
A
brings salt and other substances that harm plants.
B
happens more often and lasts much longer.
C
is followed by strong winds hat greatly affect a habitat.
D
strikes more quickly, not allowing organisms to migrate.
16) Tornadoes are catastrophic events that create change in ecosystems in which of the following ways?
A
High winds damage areas of important plant life.
B
Salt water kills many ground-dwelling animals.
C
Heavy flooding increases areas where trees can grow.
D
Wildfires started by lightning reduce carbon dioxide.
17) What change would most likely be observed in the non-living parts of an ecosystem after a hurricane?
A
Increase in oxygen in the atmosphere.
B
Higher levels of soil nutrients.
C
Less sunlight reaching ground level.
D
Taller sand dunes on the beach.
18) The extremely strong winds associated with a tornado will have the greatest negative effect on which of the following kinds of organisms?
A
Organisms that feed on decaying plants and animals.
B
Birds and other animals that use trees for shelter.
C
Fish that feed around coral reefs.
D
Smaller mammals that burrow underground.
*select an answer for all questions
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