Environment and natural resources

Our earth is surrounded by the envelope of gases called as:

• Environment

• Atmosphere

• None

The envelope of gases extends downwards

• True

• False

Humans live at the bottom of atmospheric sea of gases

• True

• False

Air consists of ___ % of nitrogen

Air consists of ____% of oxygen

Atmosphere is divided in to ____ different layers

_________ extends from surface of earth up to around 12km.

Stratosphere extends up to ___ km above troposphere.

__________extends up to 80km

Thermosphere is the region that extends up to ____ km.