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Science Practice Quiz 232
10 questions · 12 minutes
12:00
Q1.Why is it necessary to maintain an appropriate distance between seeds?
Explanation: Appropriate distance between the seeds is necessary to avoid overcrowding of plants, which allows plants to get sufficient sunlight, nutrients, and water from the soil.
Q2.What happens to plants when they are overcrowded?
Explanation: Overcrowding of plants prevents them from getting sufficient sunlight, nutrients, and water from the soil, which can lead to weak and unhealthy plants.
Q3.What is the process of adding manure to the soil called?
Explanation: The process of adding manure to the soil is called manuring, which is necessary to replenish the soil with nutrients.
Q4.What is the main advantage of using manure over fertilizers?
Explanation: According to the source text, manure enhances the water holding capacity of the soil, making it a better option than fertilizers.
Q5.What percentage of water is contained in plants?
Explanation: Plants contain nearly 90% water.
Q6.Why is irrigation necessary for crop growth?
Explanation: Irrigation is necessary to maintain the moisture of the soil for healthy crop growth.
Q7.What is the term for the supply of water to crops at regular intervals?
Explanation: The source text defines irrigation as the supply of water to crops at regular intervals.
Q8.What is the main difference between fertilizers and manure?
Explanation: Fertilizers are man-made inorganic salts, while manure is a natural substance obtained by the decomposition of cattle dung and plant residues.
Q9.Why is the frequency of watering higher in summer?
Explanation: The frequency of watering is higher in summer due to the increased rate of evaporation of water from the soil and leaves.
Q10.What is the role of water in plant growth?
Explanation: Water is necessary for the transport of nutrients dissolved in water to each part of the plant.
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