(3ai)
Specimen M - Measuring cylinder
Specimen N - Loamy soil
Specimen O - Earthworm
Specimen P - Hygrometer
Specimen Q - Thermometer
Specimen R - Hand net
(3aii)
Specimen P - It is used in meteorological science to measure the humidity, or amount of water vapour in the air.
Specimen Q - Used for measuring temperature
Specimen R - It is Used to capture fishes from the pond
(3aiii)
(i) They improve the soil structure
(ii) They help to improve the fertility and nutrient content and availability in the soil
(iii) Earthworms improve soil drainage
(3bi)
(i) The soil sample settled below the water level
(ii) The water above the soil sample increase as soil goes down
(iii) The water above the soil sample get clearer
(3bii)
Draw The Diagram