A) 20j B) 30j C) 10j D) 40j
A) Saturn B) Mars C) Mercury D) Jupiter
A) planets and moon B) stars and galaxies C) energy and power D) all of the above
A) bush burning B) farming C) rainfall D) soil erosion
A) transportation, transpiration and evaporation B) conducting, convection and radiation C) evaporation, condensation and precipitation D) All of the above
A) electromagnetic radiation B) electrical magnet radio C) electronic management radiation D) electromagnetic radio
A) avoid overgrazing B) deforestation C) planting of cover crops D) mulching
A) 77% B) 79% C) 76% D) 78%
A) water cycle B) carbon cycle C) oxygen cycle D) nitrogen cycle
A) harvesting B) conversation C) collection D) collation
A) water B) air C) liquid D) fuel
A) stable and unstable hardness B) permanent and temporary hardness C) primary and secondary hardness D) tertiary and primary hardness
A) two pure substances B) pure substance C) impure substance D) none of the above
A) all of the above B) melting and boiling points C) chemical test D) homogeneity
A) potential of hydrogen oxide B) potential of helium C) potential of hydrogen D) potential of hydrogen peroxide
A) fluoridation B) coagulation C) filtration D) ammoniation
A) lime treatment B) chlorination C) transpiration D) ammoniation
A) lead to collapse of buildin B) maintains soil texture C) loss soil fertility D) destroy soil structure
A) 20j B) 30j C) 40j D) 10j
A) seconds B) newton C) meter D) joules |