Question

When water bodies are heated during the day, a large amount of water evaporates and goes into the air. Some amount of water vapour also gets into the atmosphere because of various biological activities. This air also gets heated. The hot air rises up carrying the water vapour with it. As the air rises, it expands and cools. This cooling causes the water vapour in the air to condense in the form of tiny droplets. This condensation of water is facilitated if some particles could act as the ‘nucleus’ for these drops to form around. Give one example that acts as a nucleus here.
(vi) What do you mean by smog?
(vii) Identify the factor that helps to make the soil?
Sun
Water
Wind
All of above
(viii) Soil contains bits of decayed living organisms which is called _________.
(ix) Which statement is true about soil?
Humus is a major factor in deciding the soil structure because it causes the soil to become more porous and allows water and air to penetrate deep underground.
The mineral nutrients that are found in a particular soil depends on the rocks it was formed from.
The topmost layer of the soil that contains humus and living organisms in addition to the soil particles is called the topsoil.
All of above
(x) Name two greenhouse gases.​

Answer 1

Answer:

vi) Smog= Smoke + fog

vii) All of the above

viii) Humus

ix)

x) Carbon dioxide (CO2), Methane ( CH4)

Answer 2

a non living thing that can move on its own