Exper. Design Vocab 1
A prediction about a relationship between the independent variable and the dependent variable, written as an If...Then...Because... Statement
Hypothesis
What type of data deals primarily with numbers and not descriptors?
Quantitative
Name the independent variable in this hypothesis: " If I add fertilizer to my garden, then my plants will grow faster."
Adding fertilizer to garden
In the colors lab what was the independent variable?
The Factor or variable that responds to the independent variable
Dependent Variable
The number or experimental repetitions tested at each level of the independent variable
Repeated trials
Sam is conducting an investigation to find out which food his dog likes best. What is the independent variable in his investigation?
The kind of food he gives the dog.
We maintained three constants during the lab. The soap, the amount of milk and what other constant?
Time the soap was placed into the milk
The variable that is purposely changed by the experimenter; the "I change" variable
Independent Variable
All factors that remain the same and have a fixed value
Constants
A student wrote: "If the water temperature is decreased, then the heart rate of the jelly fish will decrease." what is the independent variable?
Temperature of the water
What was the time required to keep the soap in the milk?
1 minute
Factors or things that are changed in the experiment
Variables
What part of experimental design can be written as... "The effect of the independent variable on the dependent variable?"
Title
One student wrote: "If older compost is used then plant growth will increase." What is the dependent variable
Plant Growth
Which of the three types of milk had the highest fat content?
Half-n-half
The standard for comparing experimental effects
Control
When collecting data writing down things like color, smell, shape, and texture would all be examples of this type of data...
Qualitative
What is the dependent variable in this hypothesis? "If I replace the battery in my car, then my car will get better gas mileage"
Gas mileage
Soap is what type of molecule that allowed for us to us it in this laboratory exercise?
bipolar