1. What is difference between Metals and Non
2. Write any four characteristics of an ideal fue
3. Why is petroleum called Black Gold.?
4. What are the Biosphere reserves.?
5. What are the objectives of setting up biosph
6. Difference between plant cell and an anima
7. Draw a well labelled diagram of female
Answers
Answer:
1.)Metals shows the property of malleability while non-metals are non-malleable. Metals are generally those substances that have a shiny surface and thus are lustrous. Whereas non-metals have non-shiny appearance and thus falls under the category of non-lustrous substances.
2.)An ideal fuel should have the following properties:
It should possess high calorific value.
It should have proper ignition temperature. ...
It should not produce poisonous products during combustion. ...
It should have moderate rate of combustion.
3.)This is because when crude oil is extracted from the land it is black in color. ... Crude oil is jet black before purification but after purification, it turns golden in color; therefore, it's tagged as Gold
4.)Biosphere reserves are 'learning places for sustainable development'. ... Each site promotes solutions reconciling the conservation of biodiversity with its sustainable use. Biosphere reserves are nominated by national governments and remain under the sovereign jurisdiction of the states where they are located.
5.)The major objectives of Biosphere Reserves are: (i) To conserve diversity and integrity of plants, animals and micro-organism; (ii) To promote research on ecological conservation and other environmental aspects and; (iii) To provide facilities for education, awareness and training.
6.)A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. In plants, the cell wall surrounds the cell membrane.