7. Write answers to the following
for questions in your own words.
fet How is light scatterred by the air?
(b) Explain the various properties of
water.
ne
Het Why is the density of seawater
more than that of rain water?
(d) What is the importance of good soil
structure ?
Le What are the various uses of soil ?
(fWhat is the need and importance
of soil testing from the point of
view of farmers?
* (9) What
(9) What is the importance of air in
transmission of sound?
(h) Why should a glass bottle completely
filled with water never be kept in
a freezer?
Answers
Answer:
Write
to the following
questions in your own words.
(a) How is light scatterred by the air?
(b) Explain the various properties of
water.
(c) Why is the density of seawater
more than that of rain water?
(d) What is the importance of good soil
structure?
(e) What are the various uses of soil?
(f) What is the need and importance
of soil testing from the point of
view of farmers ?
(g) What is the importance of air in
transmission of sound?
(h) Why should a glass bottle completely
filled with water never be kept in
a freezer?
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Answer: HEYA MATE !!! HERE IS YOUR ANSWER:
Explanation:
(a) In the air, part of the sunlight is scattered. The small particles (molecules, tiny water droplets and dust particles) scatter photons the more, the shorter their wavelength is. ... Due to the scattering of light the wood in the background is
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Two elements A and B contain equal number of protons, electrons and neutrons. B contains double the number of electrons, protons and neutrons than in
The sun will pass through
Explanation:
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Answer:
In the air, part of the sunlight is scattered. The small particles (molecules, tiny water droplets and dust particles) scatter photons the more, the shorter their wavelength is. ... Due to the scattering of light the wood in the background is seen like behind a bluish veil (“aerial perspektive”).
B)Its hydrogen bonding causes its many unique properties, such as having a solid form less dense than its liquid form, a relatively high boiling point of 100 °C for its molar mass, and a high heat capacity.
C)Sea water has more density than rain water because it contains salt ions. These salt ions make the seawater heavier, which means the mass of the water increases due to the presence of salt ions.
d)A good soil structure is important to allow air and water into the soil which are vital for healthy plant growth. It will improve drainage and reduce soil erosion caused by excess surface run-off. Without structure, soils will suffer from anaerobism, waterlogging and nutrient lock-up and, ultimately, plants will die!
f)it also vital for observe the levels of degradation of land. Soil testing analyses is important for farmers to better understand their soil types and deficient of nutrients and it help to minimise the quantity and different types of fertilisers, it become cost benefit to peasants.
9)Sound waves are created by help of the disturbances in the medium. The individual particles in the air are not transmitted with the wave, but actually the propagation of the wave is what causes the particles, i.e. (molecules of the air) oscillate about an equilibrium position.
Explanation:
h)It is due to anamolous expansion. The expansion of water takes place as it is cooled from 4°C to 0°C. ... Due to this expansion a glass bottle completely filled with water and tightly closed at room temperature is likely to burst when kept in a freezer of a refrigerator.