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