The process of burning under the presence of oxygen is known as
A. combustion
B. reaction
C. respiration
D. production
Related Questions on Chapter 1: Air & Atmosphere - Science Mcqs for Grade 6
Nitrogen is obtained from the fractional distillation of liquefied air at about
A. 196°C
B. 186°C
C. 176°C
D. 166°C
A greenhouse gas that absorbs energy and maintains the earth's temperature is
A. carbon dioxide
B. oxygen
C. nitrogen
D. argon