CHAPTER 14: ENVIRONMENTAL CHEMISTRY I: ATMOSPHERE

  • Define the atmosphere.
  • Explain composition of atmosphere.
  • Differentiate between stratosphere and troposphere.
  • Summarize the components of the stratosphere and troposphere.
  • Describe major air pollutants.
  • Describe the sources and effects of air pollutants.
  • Explain ozone formation.
  • Describe acid rain and its effects
  • Describe ozone depletion and its effects.
  • Describe global warming.
  • Define atmosphere.
  • Explain composition of atmosphere.
  • Differentiate between stratosphere and troposphere.
  • Summarize the components of stratosphere and troposphere.
  • Describe major air pollutants.
  • Describe sources and effects of air pollutants.
  • Explain ozone formation.
  • Describe acid rain and its effects
  • Describe ozone depletion and its effects.
  • Describe global warming.

Many times in a day you come across mixtures, for instance, you start your day by drinking a cup of tea at breakfast, tea is a mixture, it is composed of water, milk, tea leaves, and sugar, or if you take milk instead of tea, it also is a mixture of water, minerals, proteins, vitamins, and fats. You also know that if some mud is added to a cup of tea, the tea does not remain fit for drinking. If you drink you will feel ill. Similarly from your previous knowledge of grade VI, you know that air is a mixture of various gases i.e. nitrogen, oxygen, hydrogen, carbon dioxide, noble gases, and water vapor. This chapter will enable you to understand what is meant by the atmosphere? You will also learn about the types and composition of different layers of the atmosphere. How the atmosphere gets unhealthy or polluted? Which substances make the atmosphere unhealthy or polluted? What are the sources of common air pollutants and what are their harmful effects on living things and the environment? You will also learn why the span of the summer season has extended and why the summer is getting hotter all over the world than it was about ten years before? You will also be able to know why the iron nails get rusty more quickly in rainwater than in tap water or mineral water.

  • Chemistry of Troposphere and Stratosphere
  • Greenhouse effect and global warming as resulting in climatic changes.