Science Practice Quiz 265

Q1.How much water does a dripping tap waste in a year?

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

Q2.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

Q3.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

Q4.What is the narrow zone of contact between the lithosphere, hydrosphere and atmosphere called?

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

Q5.What is the life supporting system where living beings are inter-related and interdependent called?

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

Q6.Silk is obtained from which insects that are bred on Mulberry trees?

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

Q7.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

Q8.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

Q9.Which insect helps in pollination of flowers and acts as a decomposer?

A. Bees B. Vultures C. Birds D. Butterflies

Q10.Why is the vulture considered a vital cleanser of the environment?

A. It pollinates flowers B. It feeds on dead livestock C. It produces honey D. It acts as a shelter belt

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Science Practice Quiz 265