OBJECTIVE LIFE SCIENCE
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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“That’s a pretty flower”
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“Dog’s make better pets”
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“The pond water is 30 degrees Celsius”
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“Monkey’s are the smartest of all animals”
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Detailed explanation-1: -Most lake and pond organisms prefer pH levels of 6.5 to 9. The pH levels in a given pond can fluctuate daily and is determined by complex relationships between carbon dioxide, hardness, alkalinity, photosynthesis, and respiration. If pH levels are not maintained, there could be negative effects in your pond.
Detailed explanation-2: -Use a thermometer to measure the surface water temperature of the pond. The water temperature at the deepest part of the pond can be measured using a thermometer attached to a weighted rope. Lower the device until it is just off the bottom and leave it suspended there for approximately 5 minutes.
Detailed explanation-3: -Solar radiation is the source of heat for all water bodies. The amount and angle of incidence of sunlight would decide the energy entering the water body. Distribution of heat within the water by conduction is negligible because of very low heat conductivity of water.
Detailed explanation-4: -Waters ranging in pH from 6.5 to 8.5 (at sunrise) are generally the most suitable for pond fish production. Most cultured fish will die in waters with: pH below 4.5; pH equal to or greater than 11.