जीके क्विज 19 वीं सितंबर 2016 (English)
द्वारा: डीके चौधरी
Q 1. What is the average salt content in a liter of sea water ?
(a) 39 gm (b) 37 gm
(c) 35 gm (d) 32 gm
Q 2. When water freeze in the polar ;seas the salts ?
(a) form a layer on top
(b) remain in the substance water that does not freeze
(c) sink to the bottom
(d) partly freeze and partly sink to the bottom
Q 3. Sea water is saltier than rain water because ?
(a) Sea animals are salt producing
(b) the air around the sea is saltish
(c) river wash away salts from earth and pour them into the sea.
(d) Sea beds have salt producing mines
Q 4. Neap tides occur during which of the following phases of the moon ?
(a) First quarter only
(b) First and third quarter
(c) second and third quarter
(d) Fourth quarter only
Q 5. Salinity of sea water refers to the salt content expressed in terms of gram per kilograms. The average salt content is ?
(a) 30% (b)35%
(c) 40% (d) 45%
Q 6. Tides in the sea are caused by ?
(a) Effect of Sun (b) Effect of Moon
(c) Combined effect of Moon and Sun
(d) Gravitational force of Earth and Sun
Q 7. Spring tide means ?
(a) higher high tide, higher low tide
(b) higher high tide, lower low tide
(c) lower high tide, lower low tide
(d) lower high tide, higher low tide
Q 8. Tides in the sea have stored in them ?
(a) Gravitational potential energy
(b) A combination of all the three forms of energy
(c) Hydraulic energy (d) Kinetic energy
Q 9. Which one of the following is the tide produced as a consequence of moon and sun pulling the earth in the same direction
(a) Spring tide (b) Neap tide
(c) High tide (d) Low tide
Q 10. Tides are caused by the gravitational pull of the ?
(a) Earth on the Moon (b) Earth on the Sun
(c) Moon on the Earth (d) Sun and Moon on the Earth