Pp 2ExpDSE Exposition Writing in DSE papers DSE

Pp 2_Exp-DSE

Exposition Writing in DSE papers DSE questions requiring exposition writing, some examples: * Only part of it requires writing 2

Exposition : Example (Source: 2012 DSE 1 B Q 1 c) Cappuccino is an Italian style coffee topped with a layer of frothy milk (Figure 1. 1). Figure 1. 1 Frothy milk is made by bubbling steam through milk, which is held in a metallic jug (Figure 1. 2). Steam is ejected from the steam wand of a cappuccino machine (Figure 1. 3). Figure 1. 3 Figure 1. 2 3

Exposition : Example • (a) Calculate the total amount of heat released when 20 g of steam at 110°C cools to 100°C and condenses to water at 100°C. • (b) 20 g of steam at 110°C is bubbled through 200 g of milk at 15°C to make frothy milk. Using the result in (a), estimate the temperature of the frothy milk. Would the actual temperature of frothy milk be higher than, equal to or lower than the value found in (b)? Explain. • (c) 4

Answer as Exposition Writing The actual temperature of the Statement of milk would be lower than the Position value found in (b). Argument / Explanation It is because some energy will be lost to the surroundings, e. g. , the air and the jug. Reinforcement of Position Thus, the actual temperature will be lower than that found in (b). 5

Exposition: Question expressions In what way a question requiring you to make a judgment and then the related explanation might appear? Common expressions Examples Explain whether ……. Explain whether increasing the mass of water used in the experiment would improve the accuracy of the experiment. [DSE Sample Paper 1 B Q 9 c] State …… and give a reason. , State the kind of interference that occurs at Q and give a reason for this occurrence. Comment on …… A claim is made that as power is lost due to friction, a drum with frictionless surface can further reduce the power required from the motor. Comment on this claim. [DSE 2013 Paper 1 B Q 6 c] [DSE 2013 Paper 1 B Q 3 b (iii)] Some more expressions: Do you agree … give reason to support … Which is better … explain your answer. 6

Exposition writing Structure & Language Feature Schematic Structure 1. Statement of Position/Judgment Language Feature Words to state one’s view: … is / would be / should be / [I] agree / disagree…, 2. Argument /Explanation Because …… Due to ……. , i. e. …. *3. Reinforcement of Position Thus …. . Therefore …… Hence ……. * may be omitted for shorter writing, this is usually the case in previous DSE Physics papers 7

Structure of Exposition Genre • Judgment vs Explanation: Which comes first? • In writing: Judgment before Explanation • In thinking: Explanation leads to Judgment • Why writing Judgment before Explanation? (imagine a long essay) 8