(i) There is a regular unidirectional wind from the sea to land. It helps in flying the kite high. (ii) The wind is cooler and provide comfort to kite flyers even in bright sun.
(i) There is a regular unidirectional wind from the sea to land. It helps in flying the kite high.
(ii) The wind is cooler and provide comfort to kite flyers even in bright sun.
Atmosphere of Earth is a bad conductor so acts as a temperature buffer. However, moon lacks an atmosphere around it. Therefore, moon gets heated up as sun rays fall on its surface. It cools down drastically when there is no sunlight, causing wide fluctuations in its temperature.
Atmosphere of Earth is a bad conductor so acts as a temperature buffer. However, moon lacks an atmosphere around it. Therefore, moon gets heated up as sun rays fall on its surface. It cools down drastically when there is no sunlight, causing wide fluctuations in its temperature.
The composition of gases such ds CO₂, N₂ and CO₂ remains same in atmosphere due to the process of biogeochemical cycles. During these cycles occur the repeated circulation of biogenetic nutrients between abiotic and biotic components of the environment.
The composition of gases such ds CO₂, N₂ and CO₂ remains same in atmosphere due to the process of biogeochemical cycles. During these cycles occur the repeated circulation of biogenetic nutrients between abiotic and biotic components of the environment.
Most of these elements first enter plants. and become components of organic material during the process of photosynthesis. Thus, they enter from air (CO₂), water (H₂O) and ions (N, S, p) from the soil. Form plants the chemicals pass on to other organisms through the food chains.
Most of these elements first enter plants. and become components of organic material during the process of photosynthesis. Thus, they enter from air (CO₂), water (H₂O) and ions (N, S, p) from the soil. Form plants the chemicals pass on to other organisms through the food chains.
(i) Abiotic factors of soil formation: Sun, water, wind. (ii) Biotic factors of soil formation: Lichens, mosses, herbs, shrubs, trees and animals (earthworms).
(i) Abiotic factors of soil formation: Sun, water, wind.
(ii) Biotic factors of soil formation: Lichens, mosses, herbs, shrubs, trees and animals (earthworms).
During time, air over the land becomes heated up by sun rays, it rises up and creates area of low pressure. Water of lake is not heated-up by sun rays so quickly. Evaporation of water from its surface also cools up the lake water. So, air over the surface of lake is cooler. It moves towards the landRead more
During time, air over the land becomes heated up by sun rays, it rises up and creates area of low pressure. Water of lake is not heated-up by sun rays so quickly. Evaporation of water from its surface also cools up the lake water. So, air over the surface of lake is cooler. It moves towards the land where low pressure exists. Therefore, during day time a cool breeze flows from lake to the near by
Water gets polluted from domestic wastes (loaded with detergents, faecal matter, etc.), fertilisers and pesticides from crop fields and industrial wastes (heavy metals, waste heat). (i) Fertilisers and domestic wastes cause eutrophication or increased organic loading and excessive growth of algae (aRead more
Water gets polluted from domestic wastes (loaded with detergents, faecal matter, etc.), fertilisers and pesticides
from crop fields and industrial wastes (heavy metals, waste heat).
(i) Fertilisers and domestic wastes cause eutrophication or increased organic loading and excessive growth of algae (algal bloom). This ultimately reduces oxygen available to aquatic animals (fish, molluscs) and kill them.
(ii) Domestic wastes also carry pathogens of a number of human diseases. Some of them can cause diseases of animals as well.
(iii) Pesticides and pollutants of industrial wastes directly harm the aquatic organisms and humans.
Rivers are formed from melting snow springs, and rain water flowing over land as run off. while passing through and over the rocks, the flowing water picks up minerals, silt and sand. These dissolved and suspended substances are carried by rivers to sea and make them available to marine organisms.
Rivers are formed from melting snow springs, and rain water flowing over land as run off. while passing through and over the rocks, the flowing water picks up minerals, silt and sand. These dissolved and suspended substances are carried by rivers to sea and make them available to marine organisms.
Earth's atmosphere is different from that of Venus and Mars. It contains only 0.03% carbon dioxide in addition to nitrogen, oxygen and water vapour. This is due to consistent presence of life on Earth (Gaia hypothesis). In comparison to Earth's atmosphere, atmosphere of Venus and Mars is rich in CO₂Read more
Earth’s atmosphere is different from that of Venus and Mars. It contains only 0.03% carbon dioxide in addition to nitrogen, oxygen and water vapour. This is due to consistent presence of life on Earth (Gaia hypothesis). In comparison to Earth’s atmosphere, atmosphere of Venus and Mars is rich in CO₂ (having 95 to 97% CO₂) and lifeless.
(l) Burning of fossil fuels in vehicles, thermal plants and industries. (ii) Particulate and gaseous emissions from industries, mining, processing and stone crushing.
(l) Burning of fossil fuels in vehicles, thermal plants and industries.
(ii) Particulate and gaseous emissions from industries, mining, processing and stone crushing.
Why do people love to fly kites near the sea shore?
(i) There is a regular unidirectional wind from the sea to land. It helps in flying the kite high. (ii) The wind is cooler and provide comfort to kite flyers even in bright sun.
(i) There is a regular unidirectional wind from the sea to land. It helps in flying the kite high.
See less(ii) The wind is cooler and provide comfort to kite flyers even in bright sun.
Why does moon have very cold and very high temperature variations, e.g., from -190°C to 110°C even though it is at the same distance from the sun as the Earth is?
Atmosphere of Earth is a bad conductor so acts as a temperature buffer. However, moon lacks an atmosphere around it. Therefore, moon gets heated up as sun rays fall on its surface. It cools down drastically when there is no sunlight, causing wide fluctuations in its temperature.
Atmosphere of Earth is a bad conductor so acts as a temperature buffer. However, moon lacks an atmosphere around it. Therefore, moon gets heated up as sun rays fall on its surface. It cools down drastically when there is no sunlight, causing wide fluctuations in its temperature.
See lessWhy does the percentage of gases such as oxygen, nitrogen and carbon dioxide remain almost the same in the atmosphere?
The composition of gases such ds CO₂, N₂ and CO₂ remains same in atmosphere due to the process of biogeochemical cycles. During these cycles occur the repeated circulation of biogenetic nutrients between abiotic and biotic components of the environment.
The composition of gases such ds CO₂, N₂ and CO₂ remains same in atmosphere due to the process of biogeochemical cycles. During these cycles occur the repeated circulation of biogenetic nutrients between abiotic and biotic components of the environment.
See lessAll the living organisms are basically made up of C, N, S, P, H and O. How they enter the living forms?
Most of these elements first enter plants. and become components of organic material during the process of photosynthesis. Thus, they enter from air (CO₂), water (H₂O) and ions (N, S, p) from the soil. Form plants the chemicals pass on to other organisms through the food chains.
Most of these elements first enter plants. and become components of organic material during the process of photosynthesis. Thus, they enter from air (CO₂), water (H₂O) and ions (N, S, p) from the soil. Form plants the chemicals pass on to other organisms through the food chains.
See lessSoil formation is done by both abiotic and biotic factors. Li6t the name of these factors by classifying them as abiotic and biotic.
(i) Abiotic factors of soil formation: Sun, water, wind. (ii) Biotic factors of soil formation: Lichens, mosses, herbs, shrubs, trees and animals (earthworms).
(i) Abiotic factors of soil formation: Sun, water, wind.
See less(ii) Biotic factors of soil formation: Lichens, mosses, herbs, shrubs, trees and animals (earthworms).
During summer, if you go near the lake, you feel relief from heat. Why?
During time, air over the land becomes heated up by sun rays, it rises up and creates area of low pressure. Water of lake is not heated-up by sun rays so quickly. Evaporation of water from its surface also cools up the lake water. So, air over the surface of lake is cooler. It moves towards the landRead more
During time, air over the land becomes heated up by sun rays, it rises up and creates area of low pressure. Water of lake is not heated-up by sun rays so quickly. Evaporation of water from its surface also cools up the lake water. So, air over the surface of lake is cooler. It moves towards the land where low pressure exists. Therefore, during day time a cool breeze flows from lake to the near by
See lessHow is life of organisms living in water affected when water gets polluted?
Water gets polluted from domestic wastes (loaded with detergents, faecal matter, etc.), fertilisers and pesticides from crop fields and industrial wastes (heavy metals, waste heat). (i) Fertilisers and domestic wastes cause eutrophication or increased organic loading and excessive growth of algae (aRead more
Water gets polluted from domestic wastes (loaded with detergents, faecal matter, etc.), fertilisers and pesticides
See lessfrom crop fields and industrial wastes (heavy metals, waste heat).
(i) Fertilisers and domestic wastes cause eutrophication or increased organic loading and excessive growth of algae (algal bloom). This ultimately reduces oxygen available to aquatic animals (fish, molluscs) and kill them.
(ii) Domestic wastes also carry pathogens of a number of human diseases. Some of them can cause diseases of animals as well.
(iii) Pesticides and pollutants of industrial wastes directly harm the aquatic organisms and humans.
Rivers from land and minerals to sea water. Discuss how.
Rivers are formed from melting snow springs, and rain water flowing over land as run off. while passing through and over the rocks, the flowing water picks up minerals, silt and sand. These dissolved and suspended substances are carried by rivers to sea and make them available to marine organisms.
Rivers are formed from melting snow springs, and rain water flowing over land as run off. while passing through and over the rocks, the flowing water picks up minerals, silt and sand. These dissolved and suspended substances are carried by rivers to sea and make them available to marine organisms.
See lessHow is Earth’s atmosphere different from that of Venus and Mars?
Earth's atmosphere is different from that of Venus and Mars. It contains only 0.03% carbon dioxide in addition to nitrogen, oxygen and water vapour. This is due to consistent presence of life on Earth (Gaia hypothesis). In comparison to Earth's atmosphere, atmosphere of Venus and Mars is rich in CO₂Read more
Earth’s atmosphere is different from that of Venus and Mars. It contains only 0.03% carbon dioxide in addition to nitrogen, oxygen and water vapour. This is due to consistent presence of life on Earth (Gaia hypothesis). In comparison to Earth’s atmosphere, atmosphere of Venus and Mars is rich in CO₂ (having 95 to 97% CO₂) and lifeless.
See lessMention any two human activities which would be responsible for air pollution.
(l) Burning of fossil fuels in vehicles, thermal plants and industries. (ii) Particulate and gaseous emissions from industries, mining, processing and stone crushing.
(l) Burning of fossil fuels in vehicles, thermal plants and industries.
See less(ii) Particulate and gaseous emissions from industries, mining, processing and stone crushing.