EVERYDAY SCIENCE

1. Which component of the body works as an energy storage device?
(A) Fats
(B) Proteins
(C) Liver
(D) Skin

2. What divides the Earth into the Northern and the Southern Hemispheres?
(A) Axis of rotation
(B) Equator
(C) North Pole
(D) South Pole

3. Ozone protects the Earth from harmful ultraviolet radiations from the Sun. The chemical formula of ozone is
(A) O
(B) O2
(C) O3
(D) O4

4. Human body is about _____ water by weight.
(A) 50%
(B) 60%
(C) 70%
(D) 80%

5. Who won the Nobel prize in physics for the discovery of the “Law of photoelectric effect”?
(A) Wilhelm Rontgen
(B) Ernest Rutherford
(C) Albert Einstein
(D) Isaac Newton

6. For a fixed mass of gas at constant temperature, if we decrease volume, the pressure will
(A) also decrease
(B) increase
(C) remains constant
(D) none of these

7. The lifespan of Red Blood Cells is __________ days.
(A) 60
(B) 120
(C) 180
(D) 240

8. The density of water is
(A) 1 g/cm³
(B) 1.5 g/cm³
(C) 2 g/cm³
(D) none of these

9. Radioactivity was discovered by
(A) Lord Kelvin
(B) J. J. Thomson
(C) Ernest Rutherford
(D) Henri Becquerel

10. The Sun’s mass is mainly consist of hydrogen (about 73%). The second main constituent (about 25%) is
(A) hydrogen
(B) helium
(C) carbon dioxide
(D) nitrogen

11. The Sun is a/an
(A) Star
(B) Planet
(C) Asteroid
(D) Meteor

12. The average adult has a blood volume of about ________ liters.
(A) 4
(B) 5
(C) 6
(D) 7

13. The most abundant element in the universe is
(A) Oxygen
(B) Hydrogen
(C) Carbon Dioxide
(D) Silicon

14. The most abundant element in the Earth’s crust is
(A) Oxygen
(B) Hydrogen
(C) Carbon Dioxide
(D) Silicon

15. Each day human body breathe in ________ liters of air.
(A) 5,000 to 10,000
(B) 10,000 to 15,000
(C) 15,000 to 20,000
(D) 20,000 to 25,000

16. Deficiency of Vitamin-D results in
(A) night blindness
(B) rickets
(C) scurvy
(D) hair fall

17. The SI unit of “pressure” is
(A) pascal
(B) joule
(C) tesla
(D) henry

18. The most densest substance on the Earth is
(A) Platinum
(B) Copper
(C) Steel
(D) Osmium

19. A camera uses a __________ to form an image.
(A) convex lens
(B) concave lens
(C) condenser lens
(D) none of these

20. Which from the following is NOT a conductor?
(A) Aluminium
(B) Silicon
(C) Graphite
(D) All are conductors