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