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