The atmosphere

Envelope of gases and

particles, of variable thickness and

composition

• Hydrosphere

• Geosphere

• Atmosphere

The atmosphere is made of gases only

• True

• False

Gases and suspended particles are held at the atmosphere cause their density

• True

• False

Atmosphere composition has been always the same since it's creation 4.5 billion years ago

• True

• False

Earth is the only planet that have an atmosphere

• True

• False

Select the gases that were not retain by gravity when atmosphere was formed

• Helium

• Nitrogen

• Carbon dioxide

• Hydrogen

Carbone dioxide was a gas created by bacteria in the seas

• True

• False

Oxygen was created by cyanobacteria living in the oceans

• True

• False

Mixture of gases and suspended particles

• Air

• Atmosphere

• Oxygen

Air composition is:

• 78% Oxygen

  21% Carbon Dioxide

  1% Other gases

• 78% Nitrogen

  21% Oxygen

  1% Other gases

• 78% Oxygen

  21% Nitrogen

  1% Other gases