B19 Environment of life

23 Feasible experiments.

• Soil as a habitat
• Mineral fraction of the soil
• Organic fraction of the soil
• Soil contains air
• Soil contains water
• Practice on the use of acidity indicators
• Soil acidity
• Carbonates in the soil
• The permeability of the soil
• Soil fertility
• Biodegradability and soil
• Water for life
• Water cycle
• Vaporization and condensation of water
• The rain
• Sea water
• Drinking water and its distribution
• Water pollution
• How to look for ammonia
• How to look for nitrite
• How to look for sulphates
• The research of surfactants
• What the atmosphere is?
• Air composition
• Absolute and relative humidity
• Atmospheric pollutants
• Acid rains
• The greenhouse effect