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WorksheetsG12 worksheet 1 Q2
Total questions: 29
Worksheet time: 1hrs 13mins
Gradual, natural change in an ecosystem over time:
Succession
Movement
Evolution
Change
After a volcano destroys the land, ________________ succession takes place.
Secondary
Primary
Tertiary
Important
The first species to live in a land, after destruction, are:
Oregon Trail species
Primary consumers
Pioneer species
A pattern of change after existing ecosystem is destroyed, such as clearing for farming.
Evolution
Secondary Succession
Primary Succession
Primary succession takes ____________ time than secondary succession.
More
Less
Same
A new island is formed after a volcano erupts.
What is the order that things would grow?
Tree, grass, moss
Lichen, Grass, Shrub, Tree
Lichen, Shrub, Moss, Tree
Shrub, grass, moss, tree
The first plants to grow on bare rock are:
Pioneer species
large trees
succession community
After an area was cleared for farmland 100 years ago, it has completely regrown large trees. This is an example of:
Evolution
Ecology
Primary Succession
Secondary Succession
What type of organism would typically grow on bare rock?
Moss and lichen
Grass
Oak trees
Shrubs
Would an oak tree be one of the first or last species to grow?
First
Last
What animals would be first to enter a new ecosystem?
Insects
Bears
Foxes
Elk
Primary succession occurs in an area that has:
soil
no soil
some soil
none of these
What is the main difference between primary and secondary ecological succession?
Primary begins WITHOUT soil; Secondary begins WITH soil
Primary is the first state and secondary is the second stage
Primary builds plant community; secondary builds animal community
Primary begins WITH soil; Secondary begins WITHOUT soil
What is an example of a disturbance that could bring about secondary succession?
Humans cut down many trees in a small region
A volcanic eruption covers a village in lava.
What is the term that describes a steady and stable community?
peak community
turf community
climax community
disturbed community
What causes competition to occur in an environment?
Good conditions make resources plentiful.
Organisms struggle for a limited resource.
Members of a population have different roles.
A population falls below the environment’s carrying capacity.
Without other changes to a population, which of the following will cause a population to increase in size?
The birth rate equals the death rate.
The birth rate is less than the death rate.
The birth rate is greater than the death rate.
The birth rate and the death rate both equal 0.
Which of the following is density-independent limiting factor?
disease
competition
earthquake
predation
Owls and snakes eat mice and other organisms. What would happen to the mice population if the owl population decreased?
The population would decrease, as the loss of owls as part of their diet is a limiting factor.
The population would decrease, as shelters created by owl nests is a limiting factor.
The population would increase, as competition for food is a limiting factor.
The population would increase, as predation by owls is a limiting factor.
Which of the following could be a density-independent limiting factor in the desert?
number of prey
food supply
parasitism
rainfall
Which point on the graph best represents the carrying capacity?
Letter A
Letter B
Letter C
Letter D
Letter E
Which of the following is density-independent limiting factor?
disease
competition
earthquake
predation
