UNIT 3 "The Atmosphere"

UNIT 3 : The Atmosphere

and its environmental impacts

Formation of the atmosphere

atmosphere: atmósfera

outer layer: capa externa

aire: aire

mixture: mezcla

Nitrogen: nitrógeno

oxygen : Oxígeno

Carbon dioxide: dióxido de carbono

methane: metano

hydrogen: hidrógeno

living beings: seres vivos

photosynthesis: fotosíntesis

Multiple Choice

The atmosphere is the gaseous layer that surrounds planet Earth.

• TRUE

• FALSE

Multiple Choice

What we call “air” is a mixture of gases.

• TRUE

• FALSE

Multiple Choice

Earth’s atmosphere started to form 6,000 million years ago, as the planet cooled down.

• TRUE

• FALSE

Multiple Choice

Earth’s first atmosphere was rich in carbon monoxide, nitrogen, water vapour and other gases.

• TRUE

• FALSE

Multiple Choice

Oxygen came later, produced by the cellular respiration carried out by cyanobacteria.

• TRUE

• FALSE

Multiple Choice

Thanks to the increase in oxygen, the ozone layer was destroyed.

• TRUE

• FALSE

Air characteristics and composition

SMARTBOOK

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