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2024 Experimental Design Basics Flashcards | StudBud
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2024 Experimental Design Basics
2024 Experimental Design Basics
30 terms
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#grade9 #biology #nature of science #scientific method
Flashcards
30 cards
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Practice quiz
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Questions
30
Answers
1
The dependent variable:
is what gets varied
always goes on the Y axis
goes on the X-axis
can go on either of the axes
2
What is the correct
format
of a hypothesis
Choice and consequence
If, then statement
an "I believe..." statement
an "I think..." statement
3
A good hypothesis and experiment:
must be proven
must be testable and rejectable
must be testable
can be disproved
4
The difference between a control group and a control variable:
a control group gets no treatment while control variables are constants
they are the same
a control group gets the control variables
a control variable gets no treatment while control group is held constant
5
What is an experimental group?
the group that receives no "constants"
The group that is experimented on- "received" the IV
The group that receives no treatment
The group that is experimented on- does not get control variables
6
You experiment with trying 3 types of dog food to see which food your dog liked best (volume consumed)...
best title
?
The effect of varying dog food brands on a volume of food consumed
The impact of food of preference on diet
Dog food brands versus a dog's food preference
My pug and his favorite food
7
A bar graph would be best used in this data presentation:
energy intake (# of calories) and test scores (%)
Test scores (%) of morning class versus afternoon classes
sleep (# of hours) and test scores (%)
# of hours studied and test scores (%)
8
Observation(s)...
uses your 5 senses only
uses measuring and sampling only
can use your 5 senses, but also measuring and sampling
only happens once in an experiment
9
A scatterplot or line graph would be best used in this data presentation:
time (seconds) versus temperature (oF)
heat versus cold
time (in minutes) versus study style
wind versus rain
10
What is the DV?
If
someone is exercising rigorously versus passively,
then
their heart rate will become elevated.
If
Heart Rate
Excercising
Then
11
What is the "scientific method"?
A nonlinear sequence of "steps" that help to answer a research question
A linear list of steps to take that help you answer a question
An unimportant thing that they force us to learn in science
a linear model for experimentation- set STEPS
12
What is a dependent variable (DV)?
The variable changed
The variable that no one cares about
What gets measured
The variable kept the same
13
Students measured bacterial growth (# of colonies) on incubated petri dishes every day for 2 weeks. X axis?
week number
# of bacterial colonies
14
What is a control group?
A large group with many experimental treatments
A small group that gets experimented on
The group that is changed to test a hypothesis
The group that does not get the treatment
15
Bar graphs are best used for:
two sets of numbers
sequential data
non-sequential data
comparing one group to another
16
What is a control variable?
A group that is changed
The variable(s) kept the same/constant in both control & exp. groups
The group that changes/is changed
The variable being measured to see how much it changes.
17
Students are surveyed for their favorite type of music- the results were compiled and displayed. Which graph is best?
line
bar
18
Really, what is doing "science"?
The methodical approach to the acquisition of knowledge
The study of sorcery and black magic
doing experiments
how we prove facts
19
What is a
quantitative
observation?
always goes on the Y-axis
An observation made by using numbers
An observation made using an your senses
is always non-sequential
20
Which is an
appropriately written hypothesis
?
If I test water, it might be acidic
If I practice my cello, then my skills will improve
Why does looking at the sun hurt my eyes?
I think that water is blue
21
Line graphs are best used for:
non-sequential data
two sets of numbers
comparing one group to another
sequential data
22
What is the best
hypothesis
for the research question of: Do hummingbirds prefer a certain color of food?
Hummingbirds will pick the color red
If I show hummingbirds different colors, they'll pick red
I don't like hummingbirds
If different colors of food are offered, then hummingbirds will choose red
23
The independent variable:
always goes on the X-axis
is what gets measured
can go on either of the two axes
always goes on the Y-axis
24
Students measured bacterial growth (# of colonies) on incubated petri dishes every day for 2 weeks. Which graph is best?
bar
line
25
What is a hypothesis?
a random guess
An answer to your research question
A guess
An educated but random guess
26
What is a
qualitative
observation?
An observation made with an exact number
involves sequential data
always goes on the X-axis
An observation made using your senses (doesn't involve numbers)
27
What is an independent variable (IV)?
The variable that is kept the same
The variable that changes because of another variable
The variable changed/manipulated in an experiment
The variable that gets measured
28
All axes must include:
a proper label
proper labels with units, if applicable
proper units
a proper explanation
29
What is the IV?
If
someone is exercising rigorously versus passively,
then
their heart rate will become elevated.
Resting
Excercise type
Heart Rate
Then
30
Students are surveyed for their favorite type of music- the results were compiled and displayed. Y axis?
choice in music
# of students
