Energy Flow and Succession in an Ecosystem
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by Carolyn Lemming
| 20 Questions
1
5
An ecosystem contains organisms interacting with each other and their physical environment. Which of these is the BEST indicator of a healthy ecosystem?
There are few decomposers.
There are many different species.
There are few herbivores.
There is a large population of only one species.
2
5
What is an abiotic factor found in a Desert Ecosystem?
cacti
sand
temperature
Both (B) and (C)
3
5
Which of the following is a biotic part of the forest?
trees
rocks
water
Both (B) and (C)
4
5
The graph below shows the number of organisms in an ecosystem over time. Which biological concept is BEST illustrated by the graph?
natural selection.
carrying capacity.
geographic isolation.
predator-prey relationships
5
5
Consider the graph below. Which statement below BEST explains what is occurring during section II in the population graph?
The population is at its carrying capacity.
The population is affected by density-dependent factors.
The population is smaller than the carrying capacity.
The birth rate is exceeding the death rate.
6
5
Ecosystems are made up of both living organisms and non-living things. The picture below shows some of the living organisms and the nonliving things in a desert ecosystem. A.) Identify one living organism in the ecosystem. B.) Identify one non-living thing in this ecosystem with which the living organism you named in PART A interacts. C.) Explain why it is important for the living organism to interact with the nonliving thing you identified in Part B.
7
5
Suppose an oil tanker ran aground and broke apart near the mouth of the Mississippi River and millions of gallons of crude oil and spilled out of the ship. DESCRIBE TWO effects this would likely have on the ecosystem in the surrounding environments.
8
5
________ is the source of energy for almost all living things.
Water
Sunlight
Food
Oxygen
9
5
Abiotic are all of the _____________ components in an ecosystem.
Living
Community
Non-living
Organism
10
5
Moose are grazing animals. They eat grass. If there were too many moose in an area, there would probably be
fewer predators of bison
many other large grazing animals
less grass and more bare soil
tall shrubs
11
5
What is the definition of carrying capacity?
The maximum population size of a species that the environment can sustain.
The living parts of an ecosystem.
A group of interdependent organisms together with the environment they inhabit
All the plants and animals that live in the same area and interact with one another.
12
5
The plant a ladybug lives on, the aphids that the ladybug eats, and the birds that eat the ladybugs are all
physical factors of the environment
biotic parts of the environment
abiotic parts of the environment
involved in predator-prey relationships
13
5
When a population grows larger than its carrying capacity, limiting factors in the environment cause the population to
increase
decrease
stay the same
co-evolve
14
5
A population that has reached the largest number of individuals that the environment can support over a long period of time
has no limiting factors
has changed from a food chain to a food web
has reached its carrying capacity
contains only top consumers
15
5
Limiting factors such as landslides, forest fires, floods and extreme weather are all
ways organisms compete for resources
natural disasters
predator-prey cycles
caused by ecological succession
16
5
What is an ecosystem?
A system to stop pollution
All of the biotic and abiotic factors in an area that interact with each other.
environmental factors that limit the success of a population
Largest number of individuals an ecosystem can support
17
5
Which type of succession begins with rock, which causes growth to take longer?
Primary
Secondary
Tertiary
Quatranary
18
5
Which scenario would be considered an example of Secondary Succession?
A volcano erupts causing lava to harden and leaving nothing but rock.
A forest fire breaks out burning down everything in its path but leaving soil for growth to begin again.
All of these are correct
Glaciers retreat leaving rock in order for growth to start again.
19
5
Using the energy pyramid above, which level gets the most energy directly from the producers?
Secondary Consumers
Tertiary Consumers
Primary Consumers
Producers
20
5
Using the energy pyramid above, which level would store the most energy?
Producers
Primary Consumers
Secondary Consumers
Tertiary Consumers
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