A. June 21 B. December 22 C. July 21 D. November 22
A. Cainozoic era B. Pre-Cambrian era C. Palaeozoic era D. Mesozoic era
A. the equator B. the tropics C. the arctic D. None of the above
A. the Rio Grande B. the Amazon C. the Mississippi D. the Colorado
A. Mercury B. Venus C. Earth D. Pluto
A. oceans and seas B. groundwater, rivers and streams C. glaciers and ice sheets D. freshwater lakes and water vapours
A. rock cycle B. Bowens reaction series C. both are similar terms D. None of the above
A. 5500°C B. 4000°C C. 2000°C D. 1000°C
A. northeastern zone B. northwestern zone C. southern zone D. All of the above
A. 1/2th B. 1/4th C. 1/3th D. 3/4th