Summary IGCSE A* Combined Science - Paper 6 tips & techniques

Variables
1. Constant variable (fixed / controlled)
2. Manipulated variable (independent)
3. Responding variable (dependent)


Relationship
- The higher/more the ___, the higher/lower the ___.
___ remains the same after ___
It levels off
- To support your statement of the relationship,
The ___ increases when the ___ increases/ decreases


Apparatus
➢ Balance
- To weigh
➢ Stopwatch
➢ Thermometer
➢ Gas syringe
isabelle
- To collect gas
➢ Measuring cylinder (large)
➢ Burette (medium)
- Less cooling between experiments
➢ Pipette (small)
- To collect volume at 25 cm^3 ONLY
➢ Syringe
- To collect volume between 1-10 cm^3
➢ Bunsen burner
➢ Ruler
➢ Tape measure


Safety precautions
Keep alcohol away from Bunsen flame
Be aware with hot apparatus
Wear safety goggles (content will not get into your eyes)