Q.1 Choose the correct option.
1) Careful, economical and wise use of water and avoiding the wastage of water is called
(a) Conservation of water (b) Deforestation (c) Condensation (d) Transpiration
2) A low-lying open area is called
(a) Garbage
(b) Habitat
(c) Landfill (d) None of these
3) Name the gas in the atmosphere which is essential for respiration.
Oxygen
(b) Nitrogen
(c) Hydrogen (d) Carbon dioxide
4) When light rays after striking the smooth and shiny surface return to same medium, this
phenomenon is called
(a) Reflection of light (b) Refraction of light (c) Incident ray (d) Reflected ray