Bread Experiment
Parts of an Ecosytem
Biotic or Abiotic Factors
In the Ecosystem
Odds and Ends
100
What was the objective for this experiment?
to culture bacteria and fungi
100
What is the role of bacteria in their ecosystems?
decomposers
100
10. Quantity of light and water, temperature, and soil composition are considered what kind of factors?
abiotic
100
A rabbit's role in an ecosystem is:
consumer
100
DAILY DOUBLE On the diagram on the board, compare the weather at point A and point B?
Point A is colder. [probably has clouds and thunderstorms]
200
The variable is the one thing that is:
different in both bags
200
What level consumer is the owl in the food web on the board?
3rd level consumer
200
Which of the following is an abiotic factor that would cause an ecosystem to change? A. decomposers that cause decay B. bacteria that causes disease C. new species that causes competition D. lightning that
D
200
survives by eating both animals and plants
omnivore
200
A natural unit consisting of all plants, animals and microorganisms in an area together with all the non-living physical factors of the environment is called _______.
ecosystem
300
Controls in the experiment are things that are:
kept the same in both bags
300
What role in the ecosystem is the primary source of food?
producers
300
Which of the following is an abiotic factor that would cause an ecosystem to change? A. decomposers that cause decay B. bacteria that causes disease C. new species that causes competition D. lightning that causes fire
D
300
Which organism is both predator and prey?
the snake
300
When observing an investigation comparing nesting sites of a bird species, a scientist sets up a camp under a tree where two species of bird are nesting. What is the trouble with this investigation?
The birds will be disturbed by the observation.
400
What will be the dependent variable in our bread experiments?
The experimental group with the variable cultured fungi and bacteria.
400
If there is not enough food available...
a population might decrease.
400
Which of the following are abiotic factors of an ecosytem? A. Predators hunting prey B. Bacteria that can spread disease C. Surplus or and deficit of water D. Amount of living food available
C
400
How do algae get food in an ecosystem?
photysynthesis
400
As it moves from the equator to the poles, water sinks because it is more:
dense
500
What was a safety precaution taken in this experiment?
No mayo, meat or egg; they can grow harmful bacteria OR Everything is kept in a plastic bag to guard against contamination.
500
What are the four divisions of ecosystems from most specific to least specific
Organism, Population, Community; Ecosystem
500
Name an abiotic factor in this experiment?
any reasonable answer
500
Name 3 producers.
plants, algae or phytoplankton, some bacteria
500
What is the difference in a community and a population?
A population is made up of all organisms of a particular species; a community is made up of all populations in a particular ecosystem. [something close to that]
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