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3. Independent Variable a.k.a Manipulated
Variable
-Something that is intentionally
changed by the scientist
- What can you control?
- What is manipulated?
- What is tested?
+Key word: Different
4. Dependent Variable a.k.a
Responding Variable
- Something that might be affected by
the change in the independent variable
- What is observed?
- What is measured?
- The data collected during the
investigation
8. What was the Independent
Variable?
- Ages of the students
Different ages were
tested by the scientist
9. What was the Dependent
Variable?
- The time it to put the
puzzle together
The time was observed
and measured by the
scientist
10. What were the Controlled
Variables?
-Same puzzle -
All of the participants were
tested with the same puzzle.
It would not have been a fair
test if some had an easy 30
piece puzzle and some had a
harder 500 piece puzzle.
11. Another Example:
An investigation was done with an
electromagnetic system made
from a battery and wire wrapped
around a nail. Different sizes of
nails were used. The number of
paper clips the electromagnet
could pick up was measured.
28. What was the Independent
Variable?
-The size of the
parachute
The size of the
parachute is the
one being changed
29. What was the Dependent
Variable?
- The time it takes a hippo to
fall at 10 feet
It depends on the parachute
size, which is the
independent variable
30. What were the Controlled
Variables?
- Same hippo
- Dropped from the same
height
- Same parachute fabric
- Same length of strings
on the parachute