WorksheetsEcological Succession- primary and secondary 3-18 and 3-19
Total questions: 1
Worksheet time: 7mins
1-10.
Answer the questions below after watching the video
What triggers the process of ecological succession?
Pollution
Seasonal changes
A disturbance or the creation of a new habitat
Introduction of invasive species
Which type of succession begins in areas without any soil?
Tertiary succession
Secondary succession
Quaternary succession
Primary succession
What are pioneer species?
Species that are introduced by humans
The first species to colonize newly formed or disturbed lands
The first plants to grow back after a fire
The first animals to inhabit an area
Which species are often pioneer species in primary succession?
Grasses
Lichen and moss
Evergreen trees
Deciduous trees
How do pioneer species contribute to primary succession?
By creating soil from rock
By introducing diseases
By preying on other species
By shading out other species
How does secondary succession differ from primary succession?
It occurs faster because soil is already present
It leads to less biodiversity
It does not involve pioneer species
It only happens after a volcanic eruption
What happens first in secondary succession?
Animals return to the area
Grasses and other small plants grow back
The soil is removed and replaced
Large trees grow back immediately
What is the outcome of secondary succession?
The ecosystem returns to its original state
A completely different ecosystem is formed
The ecosystem is similar but not identical to its original state
The area remains barren and devoid of life
What role do fires play in an ecosystem according to the video?
They can increase biodiversity through controlled burns
They have no significant impact
They are unnatural and should be prevented
They only cause destruction
Why are controlled burns beneficial to ecosystems?
They increase the risk of wildfires
They help manage undergrowth and promote healthy forests
They prevent the growth of plants
They destroy all the nutrients in the soil
