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