WorksheetsEcosystems Changing
Total questions: 20
Worksheet time: 11mins
When you cut down a tree, organisms that relied on it for everything from food to shade must _____________________
build another tree
find somewhere else to live or other food
go to the zoo
starve or die
What are some ways ecosystems can change?
forest fires
spraying pesticides
deforestation
all of the above
A dam was built on the Colorado river and blocked the migration of fish. The fish population will likely...
Stay the same
Decrease
Increase
Increase then decrease
which is a population?
The coyotes in the Back Bay
All the organisms in Costa Mesa
A single squirrel
All organisms on earth
Which word means "a group of animals, plants or other living things that all share common characteristics and that are all classified as alike in some manner"?
species
beneficial
detrimental
organism
Which word means "moving from one region or habitat to another, especially regularly according to the seasons"?
migration
abiotic
impact
ecosystem
Which is a HARMFUL change that plants can make to their ecosystem?
They put oxygen in the atmosphere.
They can grow over other plants and steal their space and nutrients.
Their roots keep the ground stable and prevents erosion.
They provide shelter for many animals.
Which experiences the least change over time?
Pioneer Species
Primary Succession
Aquatic Succession
Climax Community
Breaking News! A new island has formed off of Hawaii! What must occur for it to become an ecosystem?
Secondary Succession
Aquatic succession
Primary Succession
Ferns must grow
Which best describes eutriphication?
pond slowly filling with sediment over time; becoming a forest
growth of an ecosystem following a disturbance
forest burning down
humans causing succession
If you visited a forest in 2015 and there was only small plants there when revisited in 2019, what likely happened?
passing of a glacier
preservation of a habitat
occurrence of a forest fire
development of a parking lot
What best describes the term succession?
rapid changes that create an ecosystem overnight
gradual changes over time to fully create or restore and ecosystem
forest with the tallest trees
the rate species produce offspring
Which of the following is not a possible cause of ecological succession?
A. fire
B. flood
C. earthquake
D. change of season
. Which of the following is an example of primary succession?
A.lichens growing on rocks following a volcanic eruption
B.grasses growing after a forest fire
C.oak trees replacing pine trees in a forest
D. non-native species introduced into a climax community
Which of these organisms would you most expect to find on a small island that formed as a result of a volcanic two years prior?
A.climbing vines
B.hardwood tree
C.monkey
D.lichen
Over time a parasite will weaken or sicken the host.
True
False
