Aamir Mahmood

Lahore Grammar School Defence Chapter 3: Weather conditions Q1.What is atmosphere? ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ Q2.Give three reasons why atmosphere is important for earth. a. _____________________________________________________________________________ ___________________________________________________________________________________ b._____________________________________________________________________________ ___________________________________________________________________________________ c. _____________________________________________________________________________ ___________________________________________________________________________________ Q3.Name the forces that hold together our atmosphere and minimize the escape of gases into space. ___________________________________________________________________________________ ___________________________________________________________________________________ Q4.Complete the table given below: Main gases that make up the atmosphere Usage of gases Amount present in the air Q5.Complete the table below Weather Climate Q6. Effects of various factors on temperature Factor Effect on Temperature Reasons Higher altitude Lower altitude Near the coast Q7.Ways in which heat can be transmitted Method of transmission Process of transmission Example of transmission Radiation Conduction Convection Q8.Effect of cloud cover on earth’s surface a. b. Q9.Convectional rain occurs in hot tropical countries by a process of convectional uplifting. Write down below the process by which convectional rain takes place. 1. __________________________________________________________________________________________________________________________________________________________ 2. __________________________________________________________________________________________________________________________________________________________ 3. __________________________________________________________________________________________________________________________________________________________ 4. __________________________________________________________________________________________________________________________________________________________ 5. _____________________________________________________________________________ _____________________________________________________________________________ Q10.Relief rain occurs when air is forced to rise over physical barriers such as a mountain range. Write down the process of relief rain. 1. __________________________________________________________________________________________________________________________________________________________ 2. __________________________________________________________________________________________________________________________________________________________ 3. __________________________________________________________________________________________________________________________________________________________ 4. __________________________________________________________________________________________________________________________________________________________ Q11.Air pressure is the force exerted on a unit area of the earth’s surface by the weight of a column of air above it. Complete the table below Factors that affect air pressure Factor Effect on air pressure