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