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What determines sinking and floating? Shape a piece of lead, tin or aluminium foil into the form of a little boat and float it on the water in a pan; now wad the metal foil fro
The rain cycle You can reproduce the rain cycle in miniature in your classroom. Place a box of plant seedlings on the table. Place a metal tray about 35 to 40 cm above the box
Advantages of water in chemical weathering Water is an essential factor of chemical weathering and when it contains dissolved salts and acids it is all the more effective. It
Mechanical or Physical Weathering Processes A rock broken into smaller pieces is said to be physically or mechanically weathered. It has a large exposed surface area which fur
A cloud in a bottle You can make a cloud form in a bottle. Get a large glass bottle and fit with a rubber stopper carrying a 10-cm length of glass tubing. Place about 2.5 cm of
Explain physical barrier for External Defence Mechanism - Skin It provides nice protective covering to the body. The outer layer- horny layer - contains dead keratinized cells
A physician notes that in a patient there is impaired vibration and position sense, astereognosis, and ataxia. The physician noted loss of all sensations in some areas of the patie
father of environmental microbiology
Observe the surface of the moon :- Use the small telescope or a pair of field glasses. Examine the surface of the moon and see if you can see any of its craters and mountains.
what is air pressure
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