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Demonstrating an eclipse of the moon Use a flash light or a lighted candle in a darkened room to show the sun. Hold an 8 cm rubber ball in one hand to show the earth. Hold a 2-
Define the process of Soil acidity Acid soils are made more suitable for agricultural use by liming which raises the soil pH. Soil acidity is commonly decreased by adding carb
Define Minerals - Calcium, Phosphorous and Iron? Minerals are inorganic substances. This means they are not formed by living matter and contain no carbon. Minerals used in the
A compressed air pop-gun Use a straight piece of glass or plastic tubing of 1 or 2 cm in diameter and 15 or 20 cm in length. Make a piston by twisting some string on a pencil t
Using what you know about the energy—matter relationship, explain why the ecosystems with the greater amount of overall energy tend to have a greater number of organisms.
how much far sun from earth
How soil textural classes categorised and what are is their significance? The soil textural classes are based on the percentage of the separate(s) which contributes maximum to
Explain Passive transport or diffusion - Mechanism of Urine Formation Passive transport or diffusion: Diffusion means the random movement of particles in a fluid. The movement
what is diastrophism and the theories of diastrophism?
Use of natural resources: you studied about various natural resources such as land, water, soil, minerals etc. You know that these resources are limited and precious. Therefore
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