Decomposers
What is the role of decomposers?
To break down dead organisms
How does matter move in an ecosystem?
it moves in a cycle
When do prey become over populated?
When there are not enough predators
True or False
Ecosystems remain the same over time.
F
Which type of decomposer cannot store its own food?
Bacteria
Yeast and mushrooms are examples of ?
Fungi
How is energy lost as it moves through a food chain?
as heat
Are decomposers needed for an ecosystem to be healthy?
Yes
A forest fire is an example of what?
Disturbance
In a food pyramid which organism holds the most energy?
producers
Organisms to small to be seen without a microscope are called?
Bacteria
What do all food chains start with?
a producer
What does an inbalance of prey/predator relationships do to an ecosystem?
Make it unhealthy
What can cause an ecosystem to change?
Natural disasters
climate change
people
When is a human a first stage consumer?
when it eats plants (salads, veggies)
Where do broken down materials not used by decomposers end up?
the soil and air
I show just one path energy takes in an ecosystem. What am I?
food chain
True or false
Introducing new species into an ecosystem is a good idea.
F
When shrubs begin to reappear on top of dried up lava we know THIS is starting to occur.
Succession
nuts ---->mouse ---> snake ----> hawk
what will happen to the population of snakes if mice begin to die as a result of a getting sick?
their population will begin to decrease
What is a waste product of decomposers?
carbon dioxiode and nutrients
What do overlapping food chains form?
Food webs
True or False
Unusual weather can cause an ecosystem to become unhealthy
T
What change takes place during a succession?
new organisms slowly begin to grow and form a new landscape
animals begin to return
In an ecosystem of humans, deer, grass, water, trees, fish, and rabbits, where does the energy come from?
the sun