DPS INTERNATIONAL SCHOOL TOPIC: ATMOSPHERE WORKSHEET Name : ________________________ CLASS 9 ICSE _____________________________________________________________________________________ I.Short Answer Questions Question 1 1. Why atmosphere is important for us? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ 2. State the gaseous composition of the atmosphere. ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ 3. What is known as troposphere? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ 1 4. Mention any three chief characteristics of stratosphere. ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ 5. In which layer of atmosphere do all the weather conditions occur? ______________________________________________________________________________ ______________________________________________________________________________ 6. What is known as Ozone Layer? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ 7. What is leading to depletion of Ozone Layer in the atmosphere? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ II.Explain the following terms/processes i. Global Warming ii. Greenhouse Effect iii. Normal Lapse Rate of Temperature 2 ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ III.Structured Questions 1.Define atmosphere. Name the four layers of atmosphere. ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ 2.Mention any two functions of the atmosphere. ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ 3.Give a reason for each of the following: i) Ionosphere is suited to long distance communication. ii) Dust particles play a significant role in atmosphere. iii) All the weather phenomena take place in the troposphere. ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ 3 ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ 4.What will be the effect of global warming in Polar regions? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ 5.Draw a well labelled diagram of the structure of the Earth's atmosphere. 6.Draw a well labelled diagram to explain the Greenhouse Effect. 4
