3821. The ozone layer is at height of___kilometers from the surface of the Earth?
✅ A. 20 to 30
Everyday Science MCQs – Page 192
3822. The study of fish is known as ___?
✅ A. Ichthyology
3823. Which planet is much brighter in our solar system?
✅ A. Venus
3824. Which of the following is used in water purification?
✅ B. Reverse Osmosis
3825. Black gold is an oil; Black diamond is____?
✅ C. Coal
3826. The species that flower are called ____?
✅ C. Angiosperms
3827. It is possible to recognize a person in the dark by simply hearing his unique voice . It is because of the__?
✅ B. pitch
3828. The hormone that increases the rate of heart beat and blood pressure after shock in a person is______?
✅ B. Adrenalin
3829. In Fishes excretory Product is_____?
✅ A. Ammonia
3830. What is meant by “Equinox”?
✅ D. Equal duration of day and night
3831. Which is the largest organ in the human body?
✅ C. Skin
3832. ____ is anything that takes up space and has mass.
✅ B. Matter
3833. A device which converts chemical energy into electrical energy is called _____?
✅ D. battery
3834. Bubo bubo is the scientific name of which of the following species?
✅ D. Owl
3835. The type of glass used in making lenses and prism is______?
✅ C. Flintglass
3836. Most of the weather phenomena take place in which of the following layers of the atmosphere?
✅ D. Troposphere
3837. In which layer of atmosphere does commercial aircrafts usually fly?
✅ B. Stratosphere
3838. In general, the most destructive earthquake waves are the _____ ?
✅ C. Surface waves
3839. Anti Diuretic hormone is secreted by one of the following glands?
✅ B. Pituitary
3840. The heaviest naturally-occurring element is____?
✅ C. Uranium