Variables
What is a controlled variable?
A variable that is kept the same throughout each trial
Amelie has repeated her experiment three times. What category does this fall under: reliability, accuracy, fair test
Reliability
True or False: You don't need to label the bottom and side of a graph.
False
- need axis titles and units
What is a hypothesis?
An educated guess or prediction for what might happen in an experiment.
What is an independent variable?
The variable in the experiment that you change
Jess is getting consistent results. What category does this fall under: reliability, accuracy or a fair test?
Reliability
On which axis is the dependent variables placed?
Y axis (vertical)
What's the difference between quantitative and qualitative observation? Give an example of both.
QNT- observation using numbers, QL- observation without using numbers.
What is a dependent variable?
The dependent variable is the variable that responds to the independent variable.
Tina is using a beaker to measure 50mL of water. How can she improve her accuracy?
Use a measuring cylinder
Leah has quantitative data for her independent and dependent variables. What type of graph should she use?
Scatter plot or line graph
From what position should you read an instrument such as a thermometer or measuring cylinder?
At eye level with the meniscus
What is a control?
A control is remained unchanged in an experiment. It is used as a standard of comparison for checking the results of an experiment to ensure there were no confounding factors impacting the independent variable.
Aerin has only changed one variable (the independent). All others are controlled variables. What category does this fit under: reliability, accuracy, a fair test
A fair test
Leenah has qualitative and quantitative data. What type of graph should she use?
Column or bar graph
What are the main categories in a risk assessment table?
Risk/specific injury, precautions taken, management of accident
When Ms Cunningham increases the amount of time to study, usually her test scores increase as well. What is the independent variable? What is the dependent variable?
IV- amount of study time
DV- test score
Ms Cunningham is using an uncalibrated scale to measure the mass of an aspirin tablet. What is this effecting: the reliability, accuracy or fair test?
Accuracy
What is the line called when it runs through most of the points on the graph?
Line of best fit
Ms Cunningham is writing an equipment list to order: 50mL beaker, 2cm long Magnesium strips.... What has she forgotten to include in these two points?
The quantity being ordered e.g. 2x, 3x