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