esc1500L midterm Flashcards
taxis
response to stimulus
kinesis
orientation without stimulus
orthokinesis
rate of change in movement
kilokinesis
change in rate of turning
a good hypothesis should be
testable
components of a lab report and their purpose
title
intro: purpose of experiment+hypothesis
materials
procedure
results: data
discussion: analysis
conclusion: results
accuracy
how close a measured value is to an accepted value
percision
how close a set of measured values is to eachother
stereomicroscope
zoom 10x
compound microscope
used for smaller organisms, various magnifications
is a beaker or graduated cylinder more accurate
graduated cylinder
how to use a triple beam balance
start at heaviest scale to lightest scale
where to measure a graduated cylinder
eye level at meniscus
density formula
mass/volume
what is the sift method
S: stop
I: investigate source
F: find better coverage
T: trace to original content
when doing measurements in lab what should you always put at the end of your answer
units
Planning an experiment
- testable hypothesis
- test only one variable
- no observer bias
what is a planarian
non-parasitic flatworm
what do planarians eat
living and dead invertebrates
what happens when you cut a planarian in half
it regenerates into 2 planarians
what are the light sensitive spots on a planarian
eyespots
which way are planarians symetric
bilaterally
what happens after a planarian eats
nutrients get circulated, undigested food leaves through mouth
thigmotaxis
response to touch
rheotaxis
response to a water current
