Lab 1 Flashcards
what can science be defined as
quest to uncover and investigate natural phenomena
if a hypothesis is rejected, what should happen
be modified and a new experiment should take place
what is the process of the scientific method
observation
question
hypothesis
design experiment
gather data
conclusions
what are the requirements for a phenomenon to be explored
testable
well-defined
measurable
controllable
hypothesis
tentatively explains something observed and proposes an answer to a question
what does a hypothesis have to
testable and falsifiable
how does a hypothesis have to be falsifiable
it must be possible that results from an experiment do not support the explanation
null hypothesis
nothing happens so no change occurs
- usually test this one
practice making a hypothesis
look at packet or look up online
what are the two types of hypothesis
- inductive- statement (usually don’t test)
- deductive- “if” and “then”
dependent variable
- recordable observation
- outcome being measured
- something that can be measured, counted, or recorded
- in response to experimental conditions
independent variable
- condition that is manipulated
- most important
- also called manipulative variable
- variable being tested
why is it important to only have one independent variable
so you know what is causing change
why is it acceptable to have more than one dependent variable
It allows for a more comprehensive and efficient analysis
controlled variable/constants
-variables that could be an alternative independent variable
- must be kept constant
- if you can’t control everything, you’ll have large samples to test
experimental group/treatment
group that receives the variable or treatment being tested
- exposed to the independent variable
- determinine the effect of the independent variable and tests the hypothesis in an experiment
level of treatment
value set for the independent variable
- different variations of the independent variable that are applied to experimental group
control group
does not receive the treatment
- serves as baseline that allows us to see what is really due to the independent variable
- group that doesn’t get independent variable
how are predictions wrote
form of if/then statements
- at the “then” spot, you need to target a dependent variable
- have to have deductive hypothesis to test
what is the prediction always based on
particular experiment designed to test a specific hypothesis
what happens if the results do not match the prediction
hypothesis is falsified
when is a bar graph constructed
when data for independent variable are discrete categories
when is a line graph constructed
when data for independent variable are continuously variable
where is the independent variable plotted on
x-axis
where is the dependent variable plotted on
y-axis
how to write a title
- written below figure
- The effect of the (independent variable) on the (dependent variable)
theory
hypothesis which has been repeatedly tested and supported by large quantities of fata
dispersal
way for plants to spread their offspring
longer it takes for fruit to get to ground…
farther fruit can land from parent plant
dispersal far from parent plant is considered
an important adaptation for increasing survival rates
as wing length decreased in the samaras, what happened
descent rate increased
- this is bad
