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how many human body systems ?
To show the differences in soil particles Secure some glass jars that hold about half Gallon or two litres of water. Place various handfuls of soil in a jar. Fill the jar with
Lifting the water surface Bend the pointed end of a pin or use a piece of fine wire to make a hook. File the point of the hook unless it is very sharp. Put your eye on a level
Explain Light source - Pre-requisites of Colour Perception No colour may be detected by the eyes or by an instrument in the dark i.e. in the absence of a light source emitti
Define Solute-Solvent Interaction A solution, as you may already know, is a mixture of solute (present in small amount) and solvent (present in large amount). The interaction b
DISPOSAL OF WASTE MATERIALS : In a school or college science laboratory, chemical wastes, broken glassware, unserviceable non consumable items, obsolete instruments, used biologic
What are the Cultural Practices Continuous cultivation of a single crop (monoculture) over years at the same site cause s accumulation of a particular group of microbes whic
Define the categories of Soil structure Three broad categories of soil structure. These are: 1) Single grained, where each particle in a soil functions as an indivi
State the Role of Algae - Weathering Algae also plays an important role because it brings about increase in organic matter due to photosynthesis. The organic matter and CO2 fo
The Expanding Universe: Hubble's observations had proved the existence of galaxies. After mapping as many galaxies as could be seen by the telescopes then'available, he tu
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