Biology Grade 8 Question Preview (ID: 42759)


Biology Grade 8. TEACHERS: click here for quick copy question ID numbers.

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

Definition of dependent Variables
a) Changes caused by the changes made by the independent variable
b) Measured by scientists changes for the dependent variable
c) All
d) None

Oxygen
a) It makes up 21%of the atmosphere and is crucial for for sustaining life
b) Algae was one of the first aerobic organisms of earth
c) to produce enough oxygen
d) All

What is living
a) All living organisms regardless of size
b) All thing around us
c) Growing items
d) None

Non - living
a) Water, sunlight
b) Soil, Humus
c) Climate air physiography factors
d) All

Interdependency
a) Relationship which both parties depend on each other
b) People and animals don't need each other
c) they can sustain themselves
d) None

Interaction
a) Both parties can't affect other people
b) Relationship were 2 parties affect each other
c) They can only talk to each other
d) None

Mutualism
a) Both parties loose out
b) Both parties are not happy
c) Both parties benefit (+/+)
d) None

Commensalism
a) One person benefits
b) The other person is not affected (+/0)
c) All
d) None

Competiton
a) All the parties are happy
b) When neither party benefits (-/-)
c) Neither can loose
d) None

Predation
a) One party benefits
b) The other benefits negatively (+/-)
c) All
d) None

Sunlight is the primary source of _________ in the ecosystem
a) light
b) heat
c) summer
d) energy

Photosynthesis
a) All living organisms need food to grow and survive
b) Plants are known as producers
c) For many other organisms
d) All

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