middle school science activities

..

Extracting Metals towards the Top of the Activity Series - 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..

The addition of certain pollutants like the carbon dioxide gases increases the temperature of the earth. These gases remain close to the surface of earth, forming an insulating laye..

Global Warming - The addition of certain pollutants like the carbon dioxide gases increases the temperature of the earth. These gases remain close to the surface of earth, forming an insulating layer. The surface becomes hot due to the solar radiations. This radiation is normally reflected back int..

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. Reduction Using Heat Copper can also be obtained in a..

Sl. No Non - metal Physical State Symbol 1. Hydrogen Gas H 2. Nitrogen Gas N 3. Oxygen Gas O 4. Fluorine Gas F 5. Chlorine Gas Cl 6. Bromine Liquid Br 7. Astatine Solid At 8. Carbon Solid C 9. Iodine Solid I 10. Sulphur Solid S ..

Let us do more activities to understand the chemical nature of acids and base..

Resources that are unlimited in nature and are not likely to be exhausted by human activities fall under this category. Solar radiation, air, water, precipitation (rainfall, snow fall, etc.,) and atomic power are some instances of such resources. Some of them may undergo temporary imbala..

For a layman the term 'work' implies any activity resulting in muscular or mental exertion. In physics, however, the term has a different meaning. It represents a physical quanti..

The different chemical activities in the body produce many by-products several of which are waste..