science intro Flashcards
When lighting a Bunsen burner, which position should my air hole be in?
Closed
If my Bunsen burner air hole is closed what kind of flame will I have?
Safety flame
If my Bunsen burner air hole is open what kind of flame will I have?
Roaring
If my Bunsen burner air hole is half-open, half-closed what kind of flame will I have?
Normal blue
For heating solids, which Bunsen burner flame should I use?
Roaring
For gently heating, which Bunsen burner flame should I use?
Normal blue
Why should you not heat things using the safety flame?
They become sooty (carbon deposits)
The variable we change is known as….
Independent variable
Which axis on a graph is the independent variable normally plotted on?
X-axis
The variable we measure is known as…
Dependent variable
What kind of numeric data can only have certain values e.g. shoe size?
Discrete data
What kind of data is numeric and can have any value within a range e.g. height?
Continuous data
What kind of data could be a word rather than numeric value?
Categoric data
True/False - a line of best fit must be a straight line?
False - the shape depends on the relationship between variables.
True/False - a line of best fit should go from point to point
False - the line should be smooth. It should go through as many points as possible. There should be an equal number of points above and below the line.
