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