Variables
This is the variable that you change in the experiment
Independent variable
This is an educated guess
Hypothesis
10 cm = ___ mm
100 mm
What should every graph have at the top?
A title
How many independent variables does a valid experiment have?
One
A researcher was studying a new medicine for heartburn. He gave Group A a sugar cube and Group B the medicine. 15% of Group A reported reduced heartburn and 75% of Group B reported reduced heartburn. Which group is the control?
Group A (they did not get the medicine)
This is the first step in the scientific method and tells you what you want to find out
Problem or Question
400 mL = ____ L
0.4 L
The independent variable goes along which axis?
The x-axis (horizontal)
Red, square, smooth and shiny are examples of what type of observation
Qualitative
A researcher was studying a new medicine for heartburn. He gave Group A a sugar cube and Group B the medicine. 15% of Group A reported reduced heartburn and 75% of Group B reported reduced heartburn. What is the independent variable?
The medicine
These can be either qualitative or quantitative
Observations
5.4 kg = ___ dg
54,000 dg
Which variable goes along the y-axis (vertical)?
Dependent variable
4 cm long, 2 cm tall, has 3 colors and 6 holes are all examples of what type of observation
Quantitative
A researcher was studying a new medicine for heartburn. He gave Group A a sugar cube and Group B the medicine. 15% of Group A reported reduced heartburn and 75% of Group B reported reduced heartburn. What is the dependent variable?
The amount of heartburn
At the end of the experiment, this statement answers your problem
Conclusion
82 cm = ____ dKm
0.082 dKm
Why can an axis not be labeled "2, 5, 10, 12, 18"
The interval needs to be constant
What is the temperature in Kelvin at 0 degrees Celsius?
273K
In an experiment, the more weight in the bed of a pick up truck, the longer distance it took the truck to stop from the same speed. List the independent variable, dependent variable and 2 constants (must be from statement). Need all parts for credit.
Independent: Amount of weight Dependent: Distance needed to stop Constants: the truck, speed that it was traveling
It is important to do this to your data to understand the meaning
Analyze
140 mg = ___ kg
0.000140 kg
What is a graph used to show? (Need more details that just "data")
Continuous change and trends
How many dependent variables can an experiment have?
As many as needed