For hot desert locations with access to seawater, a new greenhouse des

Question

For hot desert locations with access to seawater, a new greenhouse design generates freshwater and cool air. Oriented to the prevailing wind, the front wall of perforated cardboard, moistened by a trickle of seawater pumped in, cools and moistens hot air blowing in. This cool, humidifed air accelerates plant growth; little water evaporates from leaves. Though greenhouses normally capture the heat of sunlight, a double-layered roof, the inner layer coated to reflect infrared light outward, allows visible sunlight in but traps solar heat between the two layers. This heated air, drawn down from the roof, then mixes with the greenhouse air as it reaches a second seawater-moistened cardboard wall at the back of the greenhouse. There the air absorbs more moisture before being cooled off again when it meets a seawater-cooled metal wall, which causes moisture in the air to condense. Thus distilled water for irrigating the plants collects.    1 
 For the following question, consider each of the choices separately and select all that apply.

1. It can be inferred that the process described in the passage makes use of which of the following?

A. The tendency of hot air to rise 
B. The directional movement of wind 
C. Variation in the moisture capacity of air

2  
 For the following question, consider each of the choices separately and select all that apply.

2. It can be inferred that the greenhouse roof is designed to allow for which of the following?

A. The avoidance of intense solar heat inside the greenhouse 
B. The entry of sunlight into the greenhouse to make the plants grow 
C. The mixture of heated air with greenhouse air to enhance the collection of moisture

Sajjad1994 · Answer

The passage describes a greenhouse design and the process by which the design generates freshwater and cool air in a desert environment lacking in these things.

Official Explanation

1. It can be inferred that the process described in the passage makes use of which of the following?

Choices B  and  C  are correct. This question asks the reader which of the three phenomena listed in the answer choices is used in the process described in the passage. 
 
 Choice A  is incorrect: the passage does not indicate that the tendency of hot air to rise is used in the process, and in fact says that heated air is drawn down, not up, as part of the greenhouse design. 
 
 Choice B  is correct: the second sentence describes the orientation of a perforated cardboard wall toward the prevailing wind so that hot air blows in and is moistened. 
 
 Choice C  is correct: the process depends on the ability of hot air to contain moisture that is then deposited when the air cools.

Answer: B,C

Sajjad1994 · Answer

OE

2. It can be inferred that the greenhouse roof is designed to allow for which of the following?

All three choices are correct. This question asks the reader which of the three effects listed in the answer choices are intended as part of the design of the greenhouse roof.

Choice A  is correct: the purpose of the double-layered roof is to trap solar heat before it gets inside the greenhouse proper.

Choice B  is correct: the coating on the inner layer of the roof allows visible sunlight into the greenhouse.

Choice C  is correct: the last two sentences of the passage describe how heated air from the roof is drawn down to mix with greenhouse air, resulting in the collection of distilled water for irrigation purposes. 
 
  Answer: A,B,C

For hot desert locations with access to seawater, a new greenhouse des

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