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Scientific
Investigations
Scientists conduct
investigations for
different reasons. All
investigations require a
1. question, careful
2.observations ...
There are two major
types of data:
QuaLitative and
QuaNtitative
QuaLitative Data:
Data which uses descriptive
words
(notice the L for letters!)
Describing data is gathered with
the appropriate five senses:
• 1. Sight
• 2. Hear
• 3. Smell
• 4. Taste
• 5. Touch
QuaNtitative Data:
Data which uses numbers
from measurements
(notice the N for numbers!)
Once data is gathered,
scientists thoroughly
study the data to
identify patterns which
may lead to answering
the original ...
There are different
types of investigations
that scientists may
perform.
Descriptive
Investigations…
*Gathers data
which measures
or *describes
objects or
events
Descriptive
Investigations…
Collect: quaLitative
and/or
quaNtitative
data
Descriptive
Investigations…
Includes:
1. question or
2.problem, but…..
Descriptive
Investigations…
DO Does NOT have
1. hypothesis.
2.independent
variables or
3.dependent variables.
Comparative
Investigations…
Collect data on
different organisms,
orbects or events or
under different
conditions
Comparati...
Comparative
Investigations…
Can *compares two or more
objects or events.
Comparative
Investigations…
Can *describe quantitatively
and qualitatively by finding
the similarities and
differences bet...
Comparative
Investigations…
Collects: 1.quaLitative
observations by getting
measurements
2.quaNtitative observations
by me...
Comparative
Investigations…
Includes: 1.question and
2.hypothesis.
Comparative
Investigations…
Have a 1.hypothesis ,
2.dependent variable and
3.independent
variable
Experimental
Investigations…
*Gathers data to test a
single manipulated
variable
*Describes
quantitatively and
qualitative...
Experimental
Investigations…
*Compares any changes
in the dependent variable
to a control.
Experimental
Investigations…
Collects:
1. quaLitative and
2.quaNtitative data to test
the manipulating
Variable.
Experimental
Investigations…
Iincludes: a
1.question and
a 2.hypothesis
As well as includes a
3.control and a 4.constant.
These are two different
things.
Experimental
Investigations…
Have a 1.hypothesis and
both an 2.independent
variables and 3.dependent
variables
and a 4.con...
Control:
A control is an exact setup of
the experiment you are
performing. Everything is
identical except for the
variable...
Constant:
Factor(s) that is(are) kept
the same in all trials of an
investigation.
For Example:
* The height a paper helico...
The Independent
(manipulated) Variable:
Something you may change
during an experiment to
determine its
affect. I decide
wh...
The Dependent
(responding) Variable:
This is the variable you want to
study to see if it is affected by
the independent va...
Let’s pull it all together…
Using your notes,
Fill in the data
table.
RStatement Descriptive Comparative Experimental
Has
independent
variables
x x
Has dependent
variables
x x
Has a control x
...
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Transcript of "Notes scientific investigation"

  1. 1. Scientific Investigations
  2. 2. Scientists conduct investigations for different reasons. All investigations require a 1. question, careful 2.observations and 3.data collection.
  3. 3. There are two major types of data: QuaLitative and QuaNtitative
  4. 4. QuaLitative Data: Data which uses descriptive words (notice the L for letters!)
  5. 5. Describing data is gathered with the appropriate five senses: • 1. Sight • 2. Hear • 3. Smell • 4. Taste • 5. Touch
  6. 6. QuaNtitative Data: Data which uses numbers from measurements (notice the N for numbers!)
  7. 7. Once data is gathered, scientists thoroughly study the data to identify patterns which may lead to answering the original question.
  8. 8. There are different types of investigations that scientists may perform.
  9. 9. Descriptive Investigations… *Gathers data which measures or *describes objects or events
  10. 10. Descriptive Investigations… Collect: quaLitative and/or quaNtitative data
  11. 11. Descriptive Investigations… Includes: 1. question or 2.problem, but…..
  12. 12. Descriptive Investigations… DO Does NOT have 1. hypothesis. 2.independent variables or 3.dependent variables.
  13. 13. Comparative Investigations… Collect data on different organisms, orbects or events or under different conditions Comparative Investigations… *Gathers data on different organisms, objects or events or under different conditions.
  14. 14. Comparative Investigations… Can *compares two or more objects or events.
  15. 15. Comparative Investigations… Can *describe quantitatively and qualitatively by finding the similarities and differences between organisms, objects or events
  16. 16. Comparative Investigations… Collects: 1.quaLitative observations by getting measurements 2.quaNtitative observations by measuring the temperature, time , location, etc.
  17. 17. Comparative Investigations… Includes: 1.question and 2.hypothesis.
  18. 18. Comparative Investigations… Have a 1.hypothesis , 2.dependent variable and 3.independent variable
  19. 19. Experimental Investigations… *Gathers data to test a single manipulated variable *Describes quantitatively and qualitatively
  20. 20. Experimental Investigations… *Compares any changes in the dependent variable to a control.
  21. 21. Experimental Investigations… Collects: 1. quaLitative and 2.quaNtitative data to test the manipulating Variable.
  22. 22. Experimental Investigations… Iincludes: a 1.question and a 2.hypothesis
  23. 23. As well as includes a 3.control and a 4.constant. These are two different things.
  24. 24. Experimental Investigations… Have a 1.hypothesis and both an 2.independent variables and 3.dependent variables and a 4.control. Control Miracle Grow Scotts
  25. 25. Control: A control is an exact setup of the experiment you are performing. Everything is identical except for the variable that you are testing. Water + NaCl Water + KCl Water + PCl₅Water
  26. 26. Constant: Factor(s) that is(are) kept the same in all trials of an investigation. For Example: * The height a paper helicopter is dropped. * The size of what is considered to be a “drop” of liquid. * How hard you throw the ball.
  27. 27. The Independent (manipulated) Variable: Something you may change during an experiment to determine its affect. I decide what I will test. Notice the I in Independent!
  28. 28. The Dependent (responding) Variable: This is the variable you want to study to see if it is affected by the independent variable. The affects (results) depend on the independent variable. Notice the D in Dependent!
  29. 29. Let’s pull it all together… Using your notes, Fill in the data table.
  30. 30. RStatement Descriptive Comparative Experimental Has independent variables x x Has dependent variables x x Has a control x Uses quaNtitative data x x x Uses quaLitative data x x x Compares changes x x Describes objects or events x x x
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