461. The top atmosphere of the Earth directly reflects back into space nearly what part of the total amount of sun’s energy coming to it?
✅ C. 30%
Everyday Science MCQs – Page 24
462. Optic fibers are mainly used for which of the following:
✅ B. Communication
463. The medical branch of science that deals with the study of skin, its functions, diseases, & treatment is ___ ?
✅ B. Dermatology
464. Freezing point of water is_____?
✅ B. 0 °C
465. A train goes past a railway station at a high speed. A young boy standing on the edge of the platform is likely to _____?
✅ C. Fall towards the train
466. Which bone in human body is not directly attached to other bones?
✅ A. Hyoid
467. In context of environment, the term “dirty dozen” refers to _____?
✅ C. 12 persistent organic pollutants
468. Which of the following has the largest wavelength?
✅ C. infrared light
469. The distance of a place South or North of equator is called_____?
✅ A. Latitude
470. The speed of sound in air at sea level is approximately_______?
✅ C. 340 meters per second
471. Montreal Protocol 1987 was_____?
✅ C. Treaty to protect ozone layer
472. The repetition of property after a certain interval called ______?
✅ C. periodicity of property
473. Which are the only two elements on the periodic table that are liquid at room temperature?
✅ B. Mercury and Bromine
474. Current stage of star ‘Sun’ is______?
✅ C. yellow dwarf
475. The phenomenon of Aurora Borealis, the display of red and green lights in northern hemisphere is due to radiations from_______ ?
✅ B. Ionosphere
476. Evaporation from ice and snow is known as______?
✅ A. sublimation
477. The Renaissance scientist who explained how planets moved around the sun was
✅ B. Kepler
478. Which of the following is used in beauty parlours for hair setting?
✅
479. Scientist discovered a previously undetected feature of the human Anatomy that could be the largest organ of human body?
✅ C. Interstitium
480. The average speed of a moving object during a given interval of time is always:
✅ A. the distance covered during the time interval divided by the time interval