WorksheetsInternal and external factors effects on ecosystems
Total questions: 8
Worksheet time: 4mins
Examples of external impacts on an ecosystem would be...
Light & heat energy from the sun
Rainfall
Time
Diseases
Examples of internal factors on an ecosystem would be:
Diseases spreading
What type of soil is in the ground
How many decomposers there are
DIfferent animals coming in and out of the ecosystem
What might result from internal or external impacts on ecosystems?
Change in the population of organisms
Migration
Extinction
Speciation
How might a volcanic eruption impact an ecosystem?
It could cause animals to migrate
There could less plants because sun energy is blocked by ash pollution
Different microrganisms die off from the soil being changed.
Natural disasters do not have a large impact on ecosystems
Humans can influence BOTH internal and external factors in an ecosystem.
TRUE
FALSE
All the members of an ecosystem are interconnected, so the loss or change of one factor can have large effects rippling through the entire ecosystem.
TRUE
FALSE
One area received rain after a drought and then therefore caused more vegetation to come in. This then caused an explosion of mice to live there and ultimately lots of mouse droppings. The virus that lived in the droppings moved through the air and caused humans to get sick. Was the change in human population an example an internal, external, or both impacts on an ecosystem?
Internal
External
BOTH
What two guidelines are used to measure how much an ecosystem has changed?
How quickly they can recover after a disturbance.
Ability for ecosystem to stay balanced during a disturbance.
Temperature change
