middle school science activities

Metals such as iron, zinc, lead, copper, etc., are in the middle of the reactivity series. These are moderately reactive metals and are usually present as sulphides or carbonate..

You need to get acquainted with the usage of the microscope, for observing cells..

Study the rainfall patterns in India from an atlas and identify where water is abundant and the regions of water scarcity. Did You Know? One of China's major rivers, the Yellow River, has run dry for part of the year since 1985. And in 1997 it failed to reach the sea for 226 days! The main..

Extracting Metals Low in the Activity Series - Metals that are low in the activity series are very un-reactive. The oxides of these metals can be reduced to metals by heating alone. For example, mercury is obtained from its ore, cinnabar (HgS), by the process of heating. Reducti..

Metals such as sodium, magnesium, calcium, aluminium high up in the reactivity series are very reactive and cannot be obtained from their compounds by heating with carbon. This is because these metals have more affinity for oxygen than carbon. These metals are obtained by electrolytic reduction. ..

They are the autotrophs. Their activity sustains all the organisms as they alone can trap the solar energy into food. This in turn is used by the next categor..

The different chemical activities in the body produce many by-products several of which are wastes. These waste products if allowed to accumulate will turn out to be toxic and affect the physiological activities of the body. These wastes have to be expelled out or it may eventu..

Significance of Excretion and Osmoregulation - The different chemical activities in the body produce many by-products several of which are wastes. These waste products if allowed to accumulate will turn out to be toxic and affect the physiological activities of the body. These w..

For a layman the term 'work' implies any activity resulting in muscular or mental exertio..

We have learnt that metals that are chemically active get corroded in the presence of a moist atmospher..