The rate of transpiration is influenced by any number of things. Image credit wordpress.com ZIMSEC O Level Combined Science Notes:Factors affecting rate of transpiration
Different fruits showing their seeds. Image credit blogspot.com ZIMSEC O Level Combined Science Notes: Reproduction in plants: Reproduction in Plants:Comparing different fruits and seeds
Materials: a variety of fruits
Method
Testing for organisms in the soil. ZIMSEC O Level Combined Science Notes: Experiment: Testing for the presence of micro-organisms in soil
Material:2 test tubes, lime water/bicarbonate indicator, cotton thead, corks, muslin cloth or cotton material, burner
Method
The three states of matter and volume. Image credit ucdavis.edu ZIMSEC O Level Combined Science Notes: The relationship between volume and state
Solids
A mixture of iron and sulpher. Image credit MediaWiki ZIMSEC O Level Combined Science Notes: Mixtures and compounds
ZIMSEC O Level Combined Science Notes: Experiment:Hydrogen as a reducing agent
Aim: To show that hydrogen can act as a reducing agent
Materials: hard glass test-tube with a small hole near the end, copper oxide, burner, cork with a short glass tube, rubber tube
Reducing copper using hydrogen
Method
Materials: magnesium ribbon, magnesium powder, marble chips (another form of calcium carbonate), powdered calcium carbonate, 250cm3 beakers, dilute hydrochloric acid, spatula, splint
Method a
ZIMSEC O Level Combined Science Notes: Extraction of copper from oxides
ZIMSEC O Level Combined Science Notes: Uses of sulphuric acid
Carbon dioxide extinguishes flames ZIMSEC O Level Combined Science Notes: Experiment: Demonstrating that carbon dioxide extinguishes a burning flame
Aim: to show that carbon dioxide extinguishes a flame
Materials: 3 different sized candles, vinegar, baking soda, beaker or plastic bottle, shallow dish
Method
