ZIMSEC O Level Combined Science: Carbon Dioxide and Photosynthesis
Aim: To test whether carbon dioxide is necessary for photosynthesis.
Materials: Potted green plants, potassium hydroxide solution (soda lime), two polythene bags/two bell jars, string, apparatus and reagents for the start test.
Image credit schule-bw.de ZIMSEC O Level Combined Science Notes: Amylase enzyme experiment
Experiment
Materilas: 1% amylase enzyme/saliva, 2% startch solution, visking tubing, reagents to test for starch and sugar, beakers.
Method A: Visking Tubing.
Peeled potatoes. Image credit alsalamgroup.com ZIMSEC O Level Science Notes: Experiment: Testing osmosis in living plant tissue
Materials: potatoes, knife or blade, distilled water, sugar or salt, three containers,weighing balance.
Method
Prepare three pieces of peeled potato. Each block must be […]
Fertilisation of a flower. Image credit studyblue.com ZIMSEC O Level Combined Science Notes: Reproduction in plants: Reproduction in Plants:Development after fertilization
Testing the PH of soil. Image credit blogspot.com ZIMSEC O Level Combined Science Notes: Testing the alkalinity/acidity of the soil
Materials: Universal indicator/PH paper/PH Test meter, distilled water, test tubes, soil samples
Method
States of matter. Image credit britannica.com ZIMSEC O Level Combined Science Notes: The states of matter
Eating junk food can lead to obesity. Image credit newtimes.co.rw ZIMSEC O Level Combined Science Notes: Malnutrition
ZIMSEC O Level Combined Science Notes: The oxidation process
ZIMSEC O Level Combined Science Notes: Experiment: Making salt:copper sulphate
Materials: Making a salt, copper sulphate
Materials: copper oxide, dilute sulphuric acid, plastic beaker, evaporating dish, filter funnel, filter paper, stirring rod, spatula/plastic teaspoon
Making copper sulphate
Method
The purification of copper using the flotation cell ZIMSEC O Level Combined Science Notes:Experiment: The flotation cell
Aim: To make a copper flotation cell
Materials: basin of water, mixture of sand and powdered copper sulphide, washing powder/dish washing liquid,litmus paper, rubber tube, filter funnel, tray, wooden […]
