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Observing your worm
Get a paper towel Moisten it Clear your desks except for paper and
pen Only use your hands to touch the
worm Keep your worm on the towel Observe its heartbeat
Observing its heartbeat
Find the artery in the tail end Focus on 2-3 segments Count how many times its switches
from light to dark in 30 seconds
Potential Questions to ask
What condition(s) cause a worm’s heart rate to increase?
How many times will a worm select (move towards) a specific condition?
How long does it take for a worm to respond to a specific condition?
Experimental Design Guidelines
(IF) Independent Variable: condition or situation you will set up
(THEN) Dependent Variable: Must be quantitative the NUMBER that you will record
IF/THEN hypothesis should reflect your question
Hypothesis predicts how variables will change
IF the temperature increases, THEN heart rate will go up.
010
2030
4050
607080
90
RoomTemp
Warm
WormAWormBWormC
Data collection should reflect your question
Independent Variable (x-axis) =
Dependent Variable (y-axis) =
010
2030
4050
607080
90
RoomTemp
Warm
WormAWormBWormC
Conclusions--Evaluate your hypothesis and explain results/error
Respond to your hypothesis using data.
Connect to ideas and future experiments
Explain errors and suggest improvments to minimize error
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