When harmful gases like sulphur dioxide and nitrogen dioxide, react with the water vapour present in the atmosphere to form sulphuric acid and nitric acid. The acids drop down with rain, making the rain acidic. This is called acid rain. Acid rain causes skin irritation, inhibits germination of plantRead more
When harmful gases like sulphur dioxide and nitrogen dioxide, react with the water vapour present in the atmosphere to form sulphuric acid and nitric acid. The acids drop down with rain, making the rain acidic. This is called acid rain.
Acid rain causes skin irritation, inhibits germination of plants, causes corrosion to bridges and building. It changes the fertility of the soil, destroys plants and aquatic life.
Pure air consists of a mixture of gases in proper amount which is good for living being. If by volume, about 78% of this mixture is nitrogen, about 21% is oxygen, carbon dioxide, argon, methane, ozone and water vapour are also present in very small quantities, then it is called pure air. When air isRead more
Pure air consists of a mixture of gases in proper amount which is good for living being. If by volume, about 78% of this mixture is nitrogen, about 21% is oxygen, carbon dioxide, argon, methane, ozone and water vapour are also present in very small quantities, then it is called pure air.
When air is contaminated by unwanted substances which have a harmful effect on both the living and the non-living, it is referred to as polluted air.
We can take following measures: • Water should be treated properly to make it free from harmful germs, chemical and physical impurities. • Enforce laws to treat water and chemicals before disposing into water bodies. • Proper maintenance of pipes supplying tap water to avoid any corrosion, breakageRead more
We can take following measures:
• Water should be treated properly to make it free from harmful germs, chemical and physical impurities.
• Enforce laws to treat water and chemicals before disposing into water bodies.
• Proper maintenance of pipes supplying tap water to avoid any corrosion, breakage and leakage.
• Organize awareness programmes to keep water resources clean and make a habit of conserving water.
Transparent water is not always fit for drinking. It may contain harmful microorganisms, soluble salts and other pollutants. Sometime water looks like pure but it contains dissolved salts or bacteria which are not good for us. We should purify water before drinking. Water can be purified with the heRead more
Transparent water is not always fit for drinking. It may contain harmful microorganisms, soluble salts and other pollutants. Sometime water looks like pure but it contains dissolved salts or bacteria which are not good for us. We should purify water before drinking. Water can be purified with the help of water purifier or by boiling it.
Air pollution should be checked at individual level: • At individual level, we can plant trees as trees reduce air pollution. • We can use public transportation and encourage carpooling so that air pollution can be reduced. • Instead of going by cars and scooters for short distances, we can go by foRead more
Air pollution should be checked at individual level:
• At individual level, we can plant trees as trees reduce air pollution.
• We can use public transportation and encourage carpooling so that air pollution can be reduced.
• Instead of going by cars and scooters for short distances, we can go by foot or by bicycles.
• By saying no to crackers we can minimise air pollution as well as noise pollution.
• We should not burn garbage and dry leaves. The burning of dry leaves and garbage release greenhouse gases which are responsible for global warming.
Explain circumstances leading to acid rain. How does acid rain affect us?
When harmful gases like sulphur dioxide and nitrogen dioxide, react with the water vapour present in the atmosphere to form sulphuric acid and nitric acid. The acids drop down with rain, making the rain acidic. This is called acid rain. Acid rain causes skin irritation, inhibits germination of plantRead more
When harmful gases like sulphur dioxide and nitrogen dioxide, react with the water vapour present in the atmosphere to form sulphuric acid and nitric acid. The acids drop down with rain, making the rain acidic. This is called acid rain.
Acid rain causes skin irritation, inhibits germination of plants, causes corrosion to bridges and building. It changes the fertility of the soil, destroys plants and aquatic life.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-18/
See lessExplain the differences between pure air and polluted air.
Pure air consists of a mixture of gases in proper amount which is good for living being. If by volume, about 78% of this mixture is nitrogen, about 21% is oxygen, carbon dioxide, argon, methane, ozone and water vapour are also present in very small quantities, then it is called pure air. When air isRead more
Pure air consists of a mixture of gases in proper amount which is good for living being. If by volume, about 78% of this mixture is nitrogen, about 21% is oxygen, carbon dioxide, argon, methane, ozone and water vapour are also present in very small quantities, then it is called pure air.
When air is contaminated by unwanted substances which have a harmful effect on both the living and the non-living, it is referred to as polluted air.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-18/
See lessYou are a member of the municipal body of your town. Make a list of measures that would help your town to ensure the supply of clean water to all its residents.
We can take following measures: • Water should be treated properly to make it free from harmful germs, chemical and physical impurities. • Enforce laws to treat water and chemicals before disposing into water bodies. • Proper maintenance of pipes supplying tap water to avoid any corrosion, breakageRead more
We can take following measures:
See less• Water should be treated properly to make it free from harmful germs, chemical and physical impurities.
• Enforce laws to treat water and chemicals before disposing into water bodies.
• Proper maintenance of pipes supplying tap water to avoid any corrosion, breakage and leakage.
• Organize awareness programmes to keep water resources clean and make a habit of conserving water.
Clear, transparent water is always fit for drinking. Comment.
Transparent water is not always fit for drinking. It may contain harmful microorganisms, soluble salts and other pollutants. Sometime water looks like pure but it contains dissolved salts or bacteria which are not good for us. We should purify water before drinking. Water can be purified with the heRead more
Transparent water is not always fit for drinking. It may contain harmful microorganisms, soluble salts and other pollutants. Sometime water looks like pure but it contains dissolved salts or bacteria which are not good for us. We should purify water before drinking. Water can be purified with the help of water purifier or by boiling it.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-18/
See lessAt an individual level, how can you help reduce air pollution?
Air pollution should be checked at individual level: • At individual level, we can plant trees as trees reduce air pollution. • We can use public transportation and encourage carpooling so that air pollution can be reduced. • Instead of going by cars and scooters for short distances, we can go by foRead more
Air pollution should be checked at individual level:
• At individual level, we can plant trees as trees reduce air pollution.
• We can use public transportation and encourage carpooling so that air pollution can be reduced.
• Instead of going by cars and scooters for short distances, we can go by foot or by bicycles.
• By saying no to crackers we can minimise air pollution as well as noise pollution.
• We should not burn garbage and dry leaves. The burning of dry leaves and garbage release greenhouse gases which are responsible for global warming.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-18/
See less