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