Question

How is the moon referred to in the passage?
I. A gold mine
II. A celestial body
III. Earth’s natural satellite
IV. Earth’s nearest neighbor

• A. (I) and (II) above
• B. (II) and (III) above
• C. (II) and (IV) above
• D. (II), (III) and (IV) above
• E. All (I), (II), (III) and (IV) above
• A. To carry on further research
• B. It is highly expensive to carry a bottle of water to the moon
• C. It would be greatly useful to humans if they want to set up bases on the moon
• D. It will become easy for the astronauts to stay there for a longer time
• J. It reduces the burden of carrying water for the astronauts
• A. Pave the way for the humans to return from the moon
• B. Find out if sunlight ever reaches some craters at the lunar poles
• C. Carry on complete research about the moon
• D. Establish bases on the celestial body
• O. Search for deposits of water
• A. A large number
• B. The assembled parts
• C. The automated components
• D. A restricted number
• T. An assortment
• A. Upper crust contains hydrogen
• B. Daytime temperatures are very high
• C. Lunar soil can hardly hold water
• D. Surface is covered with ice
• Y. Gravitational hold is very high
• A. Sunlight never reaches the surface of the moon
• B. Oxygen does not exist in any form on the moon
• C. It is not yet proved whether the moon holds any water or not
• D. The LRO and the LCROSS were launched in 1961
• ^. There are gold mines on the moon
• A. It exists in the form of ice
• B. It is brought by comets and meteorites
• C. It is formed through chemical reaction
• D. It is present in considerable quantities in shaded areas
• c. All the above
• A. Weather Conditions on the Moon
• B. Searching for Water on the Moon
• C. Moon – A Gold Mine for Many
• D. India’s Chandrayaan-1 Mission
• h. Man’s First Steps on the Moon
• A. Near the poles
• B. In shaded areas
• C. From any part of the moon
• D. Bottom of craters at the poles
• m. Upper layers of the soil

Answer 1

The Correct Option is D

The correct answer is option (D):

(II), (III) and (IV) above

The correct answer is (II), (III), and (IV) above. Let's break down why.

We are asked how the moon is *referred to* in a passage, meaning how the passage describes or labels it.

* II. A celestial body: This is correct. The moon is a celestial body, which is a general term for any natural object in space.

* III. Earth’s natural satellite: This is also correct. The moon orbits the Earth and is a natural satellite, a celestial body that orbits a larger body.

* IV. Earth’s nearest neighbor: This is also correct. The moon is the closest celestial body to Earth.

* I. A gold mine: This is likely incorrect. While the moon might hypothetically contain valuable resources, "a gold mine" is a figurative description representing potential wealth and is not a factual description of the moon itself. It's also not a common way to *refer* to the moon.

Therefore, the passage would likely describe the moon as a celestial body, Earth's natural satellite, and Earth's nearest neighbor. The description as a "gold mine" is not likely in this case.

Answer 2

The correct answer is option (C):

It would be greatly useful to humans if they want to set up bases on the moon

The correct answer is "It would be greatly useful to humans if they want to set up bases on the moon." This highlights the primary reason for wanting to extract water locally on the Moon.

Let's break down why:

* Sustaining Lunar Bases: Water is a fundamental resource for sustaining life. It can be used for drinking, growing food, and producing oxygen through electrolysis (splitting water into hydrogen and oxygen). Having a local water source is crucial for establishing and maintaining permanent or long-term lunar bases, making them more self-sufficient and reducing the dependence on Earth for resupply.

* Reducing Costs and Logistics: While the other options are related, they are consequences of the primary goal of establishing lunar bases. Carrying water from Earth is incredibly expensive due to the cost of launching payloads. Local extraction would significantly reduce this cost.

* Supporting Exploration: Water can also be used as rocket propellant (reacting hydrogen and oxygen). This means extracted water can fuel rockets for lunar surface exploration and potentially even for missions further into space.

* Enabling Longer Missions: The ability to extract water allows astronauts to stay longer by creating a more sustainable system.

In essence, the overarching goal of local water extraction is to enable a sustainable, less expensive, and more capable presence on the Moon, which the other benefits directly support.

Answer 3

The correct answer is option (E):

Search for deposits of water

The correct answer is "Search for deposits of water."

The Lunar Reconnaissance Orbiter (LRO) and the Lunar Crater Observation and Sensing Satellite (LCROSS) missions, both sent to the moon, had a primary scientific goal: to investigate the presence and nature of water ice in permanently shadowed craters at the lunar poles.

LCROSS, in particular, was designed to impact the lunar surface and analyze the resulting plume of debris. This allowed scientists to search for volatile substances, including water ice. The findings from these missions provided crucial evidence about the existence and distribution of water on the Moon. This is important for future lunar exploration because water could be used for various purposes such as life support, propellant, and other resources.

While the other options might be relevant to lunar exploration in general, they were not the *primary* objectives of the LRO and LCROSS missions. For example, paving the way for human return or establishing bases are broader goals that build on the knowledge gained from missions like these, but finding water was their specific and immediate scientific focus. The LRO also researched how much sunlight reaches craters, and that was part of its goals as well, but the search for water was still the key objective. Complete research is a general statement that could encompass many missions.

Answer 4

The correct answer is option (A):

A large number

The correct answer is "A large number". In the context of the phrase "slew of instruments", the word "slew" functions as a synonym for words like "many", "a lot of", or "a great number of". It indicates a substantial quantity or abundance of something, in this case, instruments. The other options do not align with this meaning. "The assembled parts" refers to the individual components, "the automated components" suggests automated elements, "a restricted number" implies a limited amount, and "an assortment" indicates a variety but doesn't necessarily imply a large quantity.

Answer 5

The correct answer is option (B):

Daytime temperatures are very high

The passage states, "The moon's surface temperatures can fluctuate dramatically. During the lunar day, temperatures can soar to about 260 degrees Fahrenheit (127 degrees Celsius), while at night, they can plummet to a frigid minus 280 degrees Fahrenheit (minus 173 degrees Celsius)." This direct evidence clearly indicates that daytime temperatures on the moon are very high, reaching over 260 degrees Fahrenheit. Therefore, option B is the correct inference. The other options are not supported by the provided text. The passage does not mention the composition of the upper crust, the ability of lunar soil to hold water, the presence of ice, or the strength of the moon's gravitational pull.

Answer 6

The correct answer is option (C):

It is not yet proved whether the moon holds any water or not

The correct answer is "It is not yet proved whether the moon holds any water or not." This is the only statement that aligns with generally accepted scientific knowledge about the moon.

* The presence of water on the moon is a topic of ongoing research and debate. While there's evidence suggesting the potential for water ice in permanently shadowed craters, it hasn't been definitively proven to exist in substantial or easily accessible quantities.

Let's look at why the other options are incorrect:

* "Sunlight never reaches the surface of the moon": This is incorrect. Sunlight illuminates the moon, allowing us to see it. It's only in permanently shadowed craters that sunlight doesn't reach.
* "Oxygen does not exist in any form on the moon": This is incorrect. While the moon lacks a significant atmosphere like Earth's, oxygen exists in the form of minerals within the lunar regolith (the moon's surface material).
* "The LRO and the LCROSS were launched in 1961": This is incorrect. The Lunar Reconnaissance Orbiter (LRO) and the Lunar Crater Observation and Sensing Satellite (LCROSS) were launched in the late 2000s, not 1961.
* "There are gold mines on the moon": This is highly unlikely and not scientifically supported. There's no confirmed evidence of economically viable gold deposits on the moon.

Answer 7

The correct answer is option (E):

All the above

The correct answer is "All the above" because all the statements contribute to the current understanding of water on the moon.

* "It exists in the form of ice" is correct. Scientists have confirmed the presence of water ice, particularly in permanently shadowed craters at the lunar poles. These areas are cold enough to trap water molecules.

* "It is brought by comets and meteorites" is also correct. These celestial bodies, composed partially of ice, are believed to have contributed water to the lunar surface through impacts over billions of years.

* "It is formed through chemical reaction" is also true. Evidence suggests that solar wind protons interacting with oxygen in lunar soil can create water molecules. This process, although not as significant as other sources, still contributes to the presence of water.

* "It is present in considerable quantities in shaded areas" is correct. The permanently shadowed craters at the lunar poles act as cold traps, allowing water ice to accumulate and persist over long periods.

Therefore, since all the given statements are correct and contribute to the understanding of water on the moon, the best answer is "All the above".

Answer 8

The correct answer is option (B):

Searching for Water on the Moon

The most appropriate title is "Searching for Water on the Moon". The prompt asks for the "apt title," meaning the most fitting and relevant. Considering the context, the title likely revolves around the central theme of the passage. The search for water on the moon is a significant and recurring topic in lunar exploration. The Chandrayaan-1 mission and other specific steps in exploring the moon can be secondary. Therefore, the best option is "Searching for Water on the Moon" because it directly encapsulates the probable main topic of the passage.

Answer 9

The correct answer is option (D):

Bottom of craters at the poles

The best place to trap ice water on the moon is at the bottom of craters located near the poles. Here's why:

The Moon has a very thin atmosphere, which means it doesn't trap heat effectively. This leads to extreme temperature variations. However, some areas on the Moon, particularly at the poles, experience near-constant darkness.

* Permanent Shadows: Craters near the poles are deep enough that sunlight never reaches the bottom. This creates permanently shadowed regions.
* Cold Temperatures: Because sunlight doesn't reach these areas, temperatures remain extremely cold, well below the freezing point of water.
* Ice Preservation: This extreme cold allows any water ice that might be present (from comets, asteroids, or solar wind) to remain frozen for billions of years, preventing it from sublimating (turning directly into a gas) and escaping into space.
* Water Trapping: Over time, volatile substances like water vapor can drift into these shadowed craters and become trapped as ice. The extremely cold environment acts like a natural freezer, preserving the ice.

Other options are not as ideal:

* "Near the poles" is a general area, the specific location is more important.
* "In shaded areas" is too broad; not all shaded areas are permanently shadowed and cold enough to trap and preserve ice effectively.
* "From any part of the moon" is incorrect, as most of the moon's surface is exposed to sunlight and experiences temperatures that would cause ice to sublimate.
* "Upper layers of the soil" is incorrect because these layers would experience temperature fluctuations that would prevent the long-term preservation of ice.