Experimental aspect Flashcards
(13 cards)
What may we be doing here?
(5 things)
- Conducting an experiment
- Risk assessment
- Plotting down table w/ results
- Creating a graph
- Rando questions afterwards (Definitely related to the context)
What resides in 1, conducting an experiment?
(2 things)
- We’re doing an experiment… (It has been confirmed it’s vibrations pendulum so)
- We have to know how we’re doing it (writing method)
Elaborate with “writing method”?
(Brief intro + 5 things to include)
- State how we’re gonna conduct the experiment
- Include:
1. Trial readings (if asked/common sense)
2. Diagram of apparatus/circuit
3. Suitable ranges & intervals to be measured
4. Details of which instruments to be read/measured and when
5. Clear statement what to be plotted on both axes
….. ALONG W/ what’s the intercept & gradient
What resides in 2, risk assessment?
(2 things)
- Writing down a risk…. assessment.
- Which we either state No significant risk…. OR
Risk assessment table “formula”?
(3 columns, 1 + 2-way + 2-way)
- Hazard
- Object/chemical & nature of hazard - Risk
- An ‘action’ in method can can create risk
- from hazard - Control measure
- Must be practicable
- in context of practical
Hence, example of a risk assessment?
(U can learn it but not like that ¬.¬)
Hazard
- Cracked glassware
Risk
- Glassware breaking causing cuts/burns
Control measure
- Inspect glassware before use
- Dispose damaged equipment
What resides in 3, table of results?
(3 things, 1 stating what 3 things to include + other with e.g.)
- Recording results in a table
- Always include:
1. Resolution (If applicable)
2. Units of measurement
3. Need a mean column - In general, varies
e.g. Trial readings? Absolute uncertainty?
What resides in 4, creating a graph?
(6 things)
- Graphing a results table pretty much
- Something (y) against something (x)
- Use convenient scale (Never use 3)
- Title and axes (labelled w/ scales and units)
- Either line of best fit or max/min gradients (for some reason it says curves….)
- Error bars
How do we form the error bars in the graph?
+ additional things
(4 things)
- From uncertainty
- The whole value on one side (not /2 and whole thing ¬.¬)
- Either error bars for a single axis or both
- It’ll ask whether we need max/min gradients but in general be aware
4 different formats of the graph?
- y = mx + c
- y = mx
- y = axn
- y = aekx
Elaborate on the first 2 formats of the graph?
(y = mx + c & y = mx)
(1 + 2-way)
- Spotting gradient, x always connected to m
- Intercept is either +/- but if u spot no intercept:
- y = mx
Elaborate on the last 2 formats of the graph?
(y = axn & y = aekx)
(3 things)
- Must create log graph instead
- Take natural logs (Ln/In since for some reason it looks like In)
- Additional column on table of results
So… what about the questions?
All on the heart of the your knowledge…!
