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Biology Grade 8
Test Description: Biology grade 8
Instructions: Answer all questions to get your test result.
1) Definition of Independent Variables
A
Variable that the scientist changes
B
Or allows to change in order to cause a
C
Result in change
D
All
2) Definition of dependent Variables
A
Measured by scientists changes for the dependent variable
B
Changes caused by the changes made by the independent variable
C
All
D
None
3) Oxygen
A
All
B
It makes up 21%of the atmosphere and is crucial for for sustaining life
C
Algae was one of the first aerobic organisms of earth
D
to produce enough oxygen
4) What is living
A
All thing around us
B
All living organisms regardless of size
C
None
D
Growing items
5) Non - living
A
Water, sunlight
B
All
C
Climate air physiography factors
D
Soil, Humus
6) Interdependency
A
None
B
they can sustain themselves
C
Relationship which both parties depend on each other
D
People and animals don't need each other
7) Interaction
A
They can only talk to each other
B
Relationship were 2 parties affect each other
C
None
D
Both parties can't affect other people
8) Mutualism
A
None
B
Both parties benefit (+/+)
C
Both parties loose out
D
Both parties are not happy
9) Commensalism
A
None
B
All
C
The other person is not affected (+/0)
D
One person benefits
10) Competiton
A
When neither party benefits (-/-)
B
None
C
Neither can loose
D
All the parties are happy
11) Predation
A
None
B
One party benefits
C
All
D
The other benefits negatively (+/-)
12) Sunlight is the primary source of _________ in the ecosystem
A
light
B
heat
C
summer
D
energy
13) Photosynthesis
A
All living organisms need food to grow and survive
B
All
C
For many other organisms
D
Plants are known as producers
*select an answer for all questions
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