7.8A Catastrophic Events Question Preview (ID: 42406)
Catastrophic Events.
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A forest fire can have which of the following positive effects?
a) Provides heat mammals need in colder seasons.
b) Increases annual rainfall by forming more clouds.
c) Clears underbrush to allow new plants to grow.
d) Drives away predators that eat smaller animals.
Which of the following is an example of how flooding can impact ecosystems?
a) Burial and uprooting of plants.
b) Removing the leaves from tall trees.
c) Increasing the nutrients in the soil.
d) Preventing plants from photosynthesizing.
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 volcanic eruption
c) A flash flood
d) An earthquake
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) clouds blocking the Sun for too long
d) storm surge moving saltwater onto land
Which of the following is the most likely effect of flooding on an ecosystem?
a) Increase in organisms that reproduce in freshwater.
b) More rapid growth of grasses and shrubs.
c) Fish that feed on plants will have to compete more.
d) Nutrients will increase in deeper layers of the soil.
Tornadoes can negatively affect an ecosystem when...
a) the saltwater they bring kills off burrowing insects.
b) their strong winds uproot many of the important plants.
c) they bring higher temperatures favored by birds.
d) the rise in water level they produce introduces harmful salt.
In a marsh ecosystem that experiences a hurricane, which of the following would be the most likely effect?
a) A loss of plant life from saltwater brought in by storm surge.
b) More burrowing animals living in the deeper soil layers.
c) Death of most organisms due to fires from lightning strikes.
d) Increase in diversity of organisms due to more competition.
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) sunlight
b) oxygen
c) precipitation
d) soil
Tornadoes can be more damaging than a hurricane to trees in a habitat because tornadoes produce...
a) more rain
b) stronger winds
c) thicker clouds
d) higher flooding
Which of the following correctly matches a catastrophic weather event with its effects on an ecosystem?
a) A flood can damage plants with high winds
b) A hurricane can kill off plants in deep water.
c) A thunderstorm's lightning can start forest fires.
d) A tornado can move a lot of seawater onto land.
How is a tornado different from a hurricane?
a) A tornado has higher speed winds.
b) A tornado brings more rain.
c) A tornado is much smaller.
d) Hurricanes do not impact life on land.
What impact does a tornado have on an ecosystem?
a) It can uproot trees, wipe out vegetation and animals, and destroy everything in its path.
b) The land becomes saturated and cannot absorb water fast enough.
c) Large amounts of salt water mix with fresh water, killing huge numbers of fish.
d) Mud and soil are deposited in different areas, trapping animals and plants underneath.
How do hurricanes affect aquatic ecosystems?
a) Trees, shrubs, and other vegetation can be uprooted.
b) Barrier islands are shifted or completely eroded away, leaving the coast unprotected.
c) Plants and animals are washed upstream.
d) Saltwater can flood freshwater habitats, killing large numbers of fish.
The term catastrophic means...
a) aquatic
b) natural ecosystem
c) extremely harmful
d) draining
A flood will have a greater effect on a habitat than a heavy rainfall event because a flood...
a) is followed by strong winds hat greatly affect a habitat.
b) strikes more quickly, not allowing organisms to migrate.
c) brings salt and other substances that harm plants.
d) happens more often and lasts much longer.
Tornadoes are catastrophic events that create change in ecosystems in which of the following ways?
a) Heavy flooding increases areas where trees can grow.
b) High winds damage areas of important plant life.
c) Wildfires started by lightning reduce carbon dioxide.
d) Salt water kills many ground-dwelling animals.
What change would most likely be observed in the non-living parts of an ecosystem after a hurricane?
a) Taller sand dunes on the beach.
b) Increase in oxygen in the atmosphere.
c) Less sunlight reaching ground level.
d) Higher levels of soil nutrients.
The extremely strong winds associated with a tornado will have the greatest negative effect on which of the following kinds of organisms?
a) Fish that feed around coral reefs.
b) Smaller mammals that burrow underground.
c) Birds and other animals that use trees for shelter.
d) Organisms that feed on decaying plants and animals.
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