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Corrosive Substances : These substances cause severe damage by chemical action when in contact with living tissue or in case of leakage, destroy /damage other materials. Mineral acids like hydrochloric acid and sulphuric acid, sodium hydroxide belong to this class.
what makes a mineral a mineral? The properties of minerals: There are seven main properties that are used to describe and classify any mineral found. All seven properties are
Oxidation Weathering by oxidation is common in rocks which are rich in the elements that can be easily oxidised e.g. iron. Iron as Fe 2+ present in a mineral is oxidised to Fe
how increases in atmospheric concentrations of carbon dioxide and other greenhouse gases cause global warming.
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.
INTRODUCTION : You have studied about the hazards of electricity in Unit 11 of Block 3. You have learnt that most of the electrical accidents like shock, fire, etc. occur often du
Making a 'burp' bottle Fit a bottle or flask with a single-hole stopper which carries a funnel. Put the stopper firmly in the bottle and then pour water into the funnel. The bo
Observing pollen grains from different flowers First of all we have to Secure several flowers in which the pollen has formed on the stamens .Shake pollen from each kind of flo
Describe the formation of igneous and metamorphic rocks? Ans) Igneous rocks are formed by volcanic action and due to of volcanic activity. Metamorphic rock is formed by a co
Explain the Mixing Movement of the Gastrointestinal Tract This movement helps the intestinal contents to be thoroughly mixed at all times. It is usually caused by the local con
Rockets or Launch Vehicles: Every flight into space begins with a rocket launching. The rocket can lift a satellite or spaceship carrying human beings and equipment into space
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