Science Practice Quiz 257

Q1.How does the text define a biosphere reserve?

A. Series of protected areas linked through a global network, intended to demonstrate the relationship between conservation and development B. A natural area designated to protect the ecological integrity of one or more ecosystems for the present and the future generations C. An international agreement between governments to regulate wildlife trade D. A programme encouraging school children to bird watch and visit nature camps

Q2.What has led to large scale destruction of forest cover and arable land?

A. Natural disasters B. Growing population and their ever growing demand C. Climate change D. Industrialization

Q3.How much water does a dripping tap waste in a year?

A. 1200 litres B. 3850 litres C. 6000 litres D. 1000 litres

Q4.What are the major contaminants of water bodies?

A. Discharge of untreated sewage, agricultural chemicals, and industrial effluents B. Natural sedimentation and volcanic ash C. Oceanic saltwater intrusion and algal blooms D. Atmospheric carbon dioxide and oxygen depletion

Q5.What pollutants are mentioned as contaminating water from agricultural chemicals?

A. Nitrates, metals, and pesticides B. Sulfates and phosphates C. Chlorides and fluorides D. Carbonates and bicarbonates

Q6.What is the narrow zone of contact between the lithosphere, hydrosphere and atmosphere called?

A. Biosphere B. Ecosystem C. Lithosphere D. Hydrosphere

Q7.What is the life supporting system where living beings are inter-related and interdependent called?

A. Biosphere B. Ecosystem C. Lithosphere D. Hydrosphere

Q8.Silk is obtained from which insects that are bred on Mulberry trees?

A. Silk worms B. Honey bees C. Lac insects D. Caterpillars

Q9.Which of the following is a non-biodegradable chemical that can reach human bodies through water?

A. Biodegradable chemicals B. Non-biodegradable chemicals C. Organic fertilizers D. Natural pesticides

Q10.Which of the following is NOT a use of plants mentioned in the text?

A. Act as shelter belts B. Help in storage of underground water C. Provide milk and meat D. Give us fruits, nuts, latex, turpentine oil, gum, medicinal plants

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Science Practice Quiz 257