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