Biology PAG 12.3

PAG 12.3 Rate of O2 production in pondweed :

•  Computer and textbooks

•  Pond-weed samples such as Elodea spp. or Cabomba spp. (Put under light before use)

• paper clips to weigh down elodea in Boiling tubes

•  Access to hot and cold water

•  Ice

• Thermometer

• Forceps

• Boiling tubes and rack

• Beakers

• Plastic dropping pipettes

• Lamp

• Coloured acetate sheets (e.g. red, green and blue)

• Meter ruler/tape measure

• Stopwatch/timer

• Scissors

• Data-logger and light sensor 2A1