_____________ present in air is a supporter of combustion .
Nitrogen
Carbon dioxide
Argon
Oxygen
------------ is the mixture of several gases.
Air
Fuel
Nitrogen.
The process of taking oxygen into cell using it for producing energy and removing the gaseous waste products is termed as
Transpiration
Respiration
Aeration
Evaporation
_____________ is produced from respiration by animals and human beings, burning of fuels etc.
Noble gases
___________ is used on stage to produce the effect of clouds.
Carbon dioxide gas
Solid carbon dioxide
Liquid ammonia
Liquid Oxygen
The air we breathe in is called _______________ air.
Liquidated
Exhaled
Inhaled
Gaseous
---------is a form of knowledge gained by careful observation and experimentation.
Science
Political Science
Social science
Physical science.
The air we breathe out is called ____________ air.
Liquefied
________ is a chemical based product.
Super conductors
Energy
Matter
______________ is the process in which a substance combines chemically with oxygen with simultaneous evolution of heat and light.
Reduction
Combustion
Burning
Rusting