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Chapter 1 Test
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40
Biology
9th Grade
09/23/2010

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Term
Scientific method
Definition
an organized approach to learn how the natural world works
Term
observation
Definition
perceiving a natural occurance that causes you to pose a question
Term
hypothesis
Definition
proposed explanation for the way something in the natural world functions
Term
prediction
Definition
statement that forecasts what would happen if you tested the hypothesis
Term
experiment
Definition
used to test a hypothesis and its predictions
Term
experimental group
Definition
identical to the control group except for one factor
Term
control group
Definition
provides a standard to compare the results of the experimental group to
Term
independent variable
Definition
factor that makes the experimental group different from the control group
Term
manipulated variable
Definition
another term for the independent variable
Term
dependent variable
Definition
factor that is affected by the independent variable
Term
constant
Definition
a factor that doesnt change when other factors do
Term
variable
Definition
the factor that is altered in an experiment
Term
theory
Definition
a generally accpeted principle that explains many observations
Term
What is biology?
Definition
the study of life
Term
Steps of the scientific method :
Definition

1. State the problem

2. Hypothesis

3. Set up a controlled experiment

4. Record and analyze results

5. Conclusion

6. Repeat experiment

Term
Describe the difference between a control and a variable in an experiment.
Definition
The control is what you compare the results of the experiment to but the variable is what you change about the control.
Term
metric unit for length :
Definition
meters (m)
Term
metric unit for mass :
Definition
gram (g)
Term
metric unit for temperature :
Definition
Kelvin (K)
Term
metric unit for volume :
Definition
liters (l)
Term
Name 10 lab safety rules.
Definition

1. maintain quiet behavoir

2. dont rush an experiment

3. dont eat or drink in the lab

4. use materials properly

5. tie back long hair

6. wear protective goggles and an apron

7. clean up work area

8. report injuries to teachers

9. open windows and doors for ventilation

10. know where fire equipment is

Term
8 characteristics of living things :
Definition

1. highly organized with cells

2. respond to stimuli

3. homeostasis

4. metabolism

5. growth and development

6.reproduction

7. evolution

Term
homeostasis
Definition
maintenance of a constant level of internal conditions even though environmental conditions are constantly changing
Term
cell
Definition
smallest unit that can perform all of life's processes
Term
organization
Definition
degree of order within an organism's internal and external parts and its functions
Term
unicellular
Definition
made up of one cell
Term
multicellular
Definition
made up of many cells
Term
stimulus
Definition
a physical or chemical change in the internal or external environment
Term
metabolism
Definition
all the chemical reactions that take in and transform energy
Term
growth
Definition
division and enlargement of cells
Term
cell division
Definition
the formation of two new cells from an exsisting cell
Term
development
Definition
the process where and organism becomes a mature adult
Term
reproduction
Definition
when organisms produce new organisms like themselves
Term
evolve
Definition
change through time
Term
diversity
Definition
variety
Term
list and describe the 8 processes of life
Definition

1. nutrition (food and water)

2. growth (cells)

3. reproduction (sexual and asexual)

4. excretion (waste)

5. secretion ( sweat, saliva, hormones)

6. respiration (breathing)

7. movement

8. response to environment

Term
compare growth and development of an organism
Definition
they are both dealing with increasing cells and growing in some way
Term
compare sexual and asexual reproduction
Definition
they are both dealing with reproducing something of the same type
Term
list the levels of organization starting with the atom
Definition

-atom

-biological molecule

-organelle

-cell

-tissues

-organ

-organ system

-organism

Term
how does growth among living things and non living things differ
Definition
when living things grow they increase in size and they become more developed. however when non living things grow they just gain more of the substance they are made out of.
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