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