Chapter: Life Sciences
While travelling to a hilly region, you notice amassive boulder, whi ch was loosened by heavyrains and moved downhill. This has resulteddue to which of the following processes?
1. Mass wasting
2. Erosion
3. Weathering
Select the correct answer using the code givenbelow.
Mass wasting refers to the downhill movement of materials under the influence of gravity, while erosion is the process of transporting weathered materials, and weathering involves the breakdown of rocks and minerals.
The scenario involves:
Remember: Mass Wasting Weathering and Erosion - MWE combination leads to landscape change!
A diagram illustrating the processes of mass wasting, erosion, and weathering in a hilly terrain—with arrows indicating movement and flow of water—can enhance understanding.
Verified against NCERT Class 11 Geography, Chapter 2: Landform Development and Processes.
Which one of the following is not a form of condensation?
Condensation is the process by which vapor transitions into liquid, typically occurring when temperature decreases or pressure increases. Common forms include dew, fog, and frost.
1. **Dew** forms when moisture in the air condenses into droplets on cooler surfaces during the night.
2. **Fog** is a cloud of tiny water droplets that forms near the ground, resulting from condensation of water vapor when the air cools.
3. **Frost** occurs when condensation turns to ice, forming on surfaces when the temperature drops below freezing.
4. **Sleet**, however, consists of ice pellets formed from freezing rain and is not a result of condensation.
Option A (Dew), Option B (Fog), and Option C (Frost) are all processes resulting from gas-to-liquid condensation, while Option D (Sleet) results from frozen precipitation.
Remember DFF: Dew, Fog, Frost are condensation forms; S is for Sleet, which is different.
A flowchart illustrating the transition from vapor to dew, fog, and frost, emphasizing the temperature changes and humidity levels, while clearly distinguishing sleet at the bottom as a separate process.
Verified against NCERT Class IX Science, Chapter on Weather and Climate.
Which of the following statements with reference to soil forming processes is/arecorrect?
1. Translocation, enrichment, removal and transformation are different classes of soil forming processes
2. In translocation, fine particles are transported downward by eluviation and accumulate in lower horizons by illuviation
Select the answer using the code given below:
Soil-forming processes can be classified into four broad categories: translocation, enrichment, removal, and transformation.
Both statements support the classification of soil-forming processes correctly. Therefore, options 1 and 2 are valid, reaffirming that both processes exist and contribute significantly to soil development.
A flowchart depicting the soil formation process, showing how eluviation (upward movement) and illuviation (downward accumulation) correlate with translocation. Include arrows to illustrate the movement of particles and label each horizon of the soil profile for clarity.
Verified against NCERT Class XII Geography, Chapter on Soils.
Condensation of water vapour into water is influenced by which of the following factor/factors?
1. Volume of air
2. Humidity
3. Temperature
Select the answer using the code given below:
Option D is correct. All three factors (Volume of air, Humidity, Temperature) influence the condensation of water vapor into water.
Condensation of water vapor occurs when air reaches saturation point, influenced by air volume, humidity (amount of water vapor present), and temperature (critical for reaching dew point).
Condensation is a process where water vapor transforms into liquid water when air is cooled or reaches saturation.
Use the mnemonic "VHT": Volume expands, Humidity saturates, Temperature cools. All three complete condensation.
Condensation depends on the interplay between air volume, humidity levels, and temperature, achieving saturation and dew point.
Imagine a dynamic chart showing the relationship between volume, humidity, and temperature changes, indicating how each factor contributes to reaching the dew point for condensation.
Which of the following statements regarding humidity is/are correct?
1. It is a ratio between the actual amount of water vapour present in the atmosphere and the maximum amount it can hold at a given temperature.
2. When the relative humidity is high, more water evaporates from the skin.
3. Higher the air temperature lower the relative humidity of the air.
Select the answer using the code given below:
Humidity is defined as the amount of water vapor present in the air relative to the maximum amount the air can hold at a certain temperature. This is expressed as a percentage known as relative humidity.
Remember: "Hot air holds more," which means as temperature rises, relative humidity can drop if moisture levels remain constant.
Verified against NCERT Class XI Environmental Science, Chapter on Weather and Climate.
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