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Reading Comprehension

46. According to the passage,

48. The phrase “This condition” in line 11 refers to -

molecules can completely escape from a liquid only when they -

(1) saturation of the air above a liquid (2) the process of evaporation (3) the high energy of some molecules in a liquid (4) the physical state of a liquid

(1) form the surface layer of a liquid (2) are in a gaseous state (3) have enough energy to pass through the boundary surface of the liquid (4) have enough energy to escape the attraction of surface molecules

מתייחס בדיוק למצב המתואר בסוף המשפט

הקודם.

49. The primary purpose of the last paragraph is -

שורות 1-6 .

47. The condition of equilibrium

(1) to explain how evaporation affects the human body (2) to explain the effects of temperature on the process of evaporation (3) to explain how weather affects the saturation point (4) to explain how the human body functions differently in different types of weather

mentioned in the second paragraph refers to the state in which -

(1) evaporation begins to occur (2) all the molecules of a liquid

have been converted into vapor

(3) a liquid gains from the air surrounding it as many molecules as it loses (4) the temperature of a liquid is the same as that of the air above it

פסקה זו מתארת כיצד התאיידות המים שומרת על הגוף קריר.

בשורות 11-12 נאמר כי מצב של שווי משקל מושג כאשר מספר המולקולות העוזבות את הנוזל שווה למספר המולקולות החוזרות אליו, כלומר, כאשר הפסד המולקולות נטו הוא אפס.

50. The best title for this passage would be -

(1) Evaporation and Human Physiology (2) The Physical Processes of Evaporation (3) Experiments with Evaporation (4) How Evaporation Produces Cooling

תשובה ( 3 ) אינה קשורה לקטע, ותשובות ( 1 ( -) ו 4 ) מתייחסות רק לחלקים מתוכו ולא לכללותו.

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