Last updated on June 28th, 2023 at 09:18 pm
What is purification of water, what are sediments and residue?
Ans. Sedimentation is the process by which heavy insoluble impurities in water settle down. These substances are called sediments. Water is filtered through the use of filter paper to remove insoluble impurities. Insoluble impurities left behind in the filter paper are called the residue.
Name the solid, liquid and gaseous states of water.
Ans. Ice, water and vapour
What is biosphere?
Ans. All life on earth is contained within the biosphere. It consists of three layers: air (atmosphere), water (hydrosphere) and land (lithosphere).
What is evaporation? What factors affect evaporation?
Ans. During the evaporation process, liquid water is changed into gaseous water vapour. Evaporation depends on temperature, surface area, wind speed, and humidity.
How is rain caused?
Ans. Water vapor condenses to form small drops of water. These droplets combine to form clouds. Droplets collide with each other when the wind blows, forming larger drops.
Give some common methods of removing soluble impurities from water.
Ans. Boiling, chlorination, and distillation are common methods used to remove soluble impurities from water
