Core Practical 1 Post lab

CPAC 4b - Obtains accurate, precise and sufficient data for experimental and investigative procedures and records this methodically using appropriate units and conventions. 

·        write down the exact volume value to 0.5cm3

·        Mass are recorded to at least 2dp’s (ensure zeros are written in for 2dps)

·        Read scales correctly on all pieces of apparatus (teacher to check on reading per student)

·        Draw graph with appropriate scale which fills page includes labels and units on axis (use computer program to get 5a processes data can behand drawn for 4b)

·        Plot points accurately and draws appropriate line of best fit.

• Use computer software to process data & plot an accurate graph CPAC 5a

• Ensure that points plotted on a graph take up more than half the available space on both scales. Axes must occupy half of the space on graph paper. 

• Keep scales simple: one big square as 5 or 10 or 20 is ideal, one big square as 3 or 7 is very difficult to plot on and often leads to errors. 

• Always consider whether or not the graph line should go through the origin. Straight lines should be drawn with aid of a rule – one long enough to cover the full length of the line. 

• Comments on graph to report findings in a conclusion with citation

• Ensure that points plotted on a graph take up more than half the available space on both scales. Axes must occupy half of the space on graph paper. 

• Keep scales simple: one big square as 5 or 10 or 20 is ideal, one big square as 3 or 7 is very difficult to plot on and often leads to errors. 

• Always consider whether or not the graph line should go through the origin. Straight lines should be drawn with aid of a rule – one long enough to cover the full length of the line. 

Recognise and make use of appropriate units in calculations. 

Use ratios, fractions and percentages. 

Translate information between graphical, numerical and algebraic forms. 

Plot two variables from experimental or other data