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