WorksheetsCompetition & Environmental Changes
Total questions: 20
Worksheet time: 27mins
Which statement is the best prediction the students can make about the immediate future of the pond?
F
G
H
J
Water with which of these conditions would cause the most competition for resources among all three species of fish?
A
B
C
D
How does this chemical help black walnut trees compete with plants growing nearby?
A
B
C
D
Based on the graph, which ranch animals compete for the most food with white-tailed deer?
A
B
C
D
Plants obtain the majority of the carbon necessary for building these structural molecules from --
F
G
H
J
Special terms to describe what an organism eats:
Carnivore- secondary consumer (eats only animals)
herbivore-primary consumer (eats only plants)
producer-eats sunlight & water
Omnivore-(eats both plants and animals)
Which organisms in the food web shown above compete for the same food source in this environment?
A
B
C
Df
Which examples have characteristics of primary succession?
1 and 2
1 and 4
2 and 3
2 and 4
Which examples have characteristics of secondary succession?
1 and 2
1 and 4
2 and 3
2 and 4
Which of the following is an example of a disturbance that might trigger the start of secondary succession?
a hurricane causing a devastating flood.
Newly formed sand dunes.
A glacier stripping away all plant life and soil all the way down to bedrock.
A volcano forming a new island in a chain.
Which of the following real-life events could represent Example 3?
The regrowth of a forest after a devastating fire
The formation of an island ecosystem from a hot spot in Earth’s crust
A grassland ecosystem emerging after a severe flood
All of the above
Which of the following real-life events could represent Example 1?
The regrowth of a forest after a devastating fire
The formation of an island ecosystem from a hot spot in Earth’s crust
The formation of sand dunes
All of the above
What is the function of a pioneer species?
To prepare the forest for a natural disturbance.
To scout out an area and see if it is suitable for growth.
The break down exposed rock and other nutrients into soil.
To establish a relationship between two ecosystems.
What is a difference between primary and secondary succession?
Primary succession results in a climax community, whereas secondary succession results in a destroyed community.
Primary succession starts with bare rock, whereas secondary succession starts with an already established community of plants.
. Primary succession takes a shorter amount of time because it begins with already established soil, whereas secondary succession takes a longer period of time because it begins with bare rock.
Primary succession takes a longer period of time because it begins with bare rock, whereas secondary succession takes a shorter amount of time because it begins with already established soil.
What is true about long-term environmental changes?
Many long-term environmental changes are due to predictable weather patterns and happen quickly.
Long-term environmental changes never cause lasting effects in an area.
Many long-term environmental changes affect organisms over many generations.
Long-term environmental changes are usually predictable and easy to avoid.
In a farm ecosystem, a farmer starts using a certain pesticide to protect his crops. A species of cricket is especially susceptible to this pesticide and most of the population dies off. What type of environmental change is this?
It is a short-term environmental change.
It is a long-term environmental change.
It is not an environmental change.
. It is a short-term and long-term environmental change.
Which of the following is an example of a short-term environmental change?
Subduction of one tectonic plate beneath another
Erosion of a coastline
Deposition of sediments in a river
Severe lack of rainfall during a drought
How are populations affected by short-term environmental changes?
They do not have time to adapt to the changes that take place
They increase in number significantly due to the changes that take place
Only certain individuals are affected by the changes that take place
They are not affected by the changed that take place
How does the lion pictured depend on other biotic factors for survival?
Food Source
Protection
Warmth
Shelter
Which of the following is not an abiotic factor represented in the picture?
Dirt
Sunlight
Water
Air
