Продолжительность: 7:40
Опубликовано: 11 мар. 2018 г.

Продолжительность: 2:59
Опубликовано: 23 янв. 2024 г.

19 сент. 2024 г. · The Air and Its Uses. Air is the invisible mixture of gases that surrounds the Earth and is breathed in by humans and animals.

Air is composed of various gases. It also contains water vapour, dust particles, smoke, and germs.

Продолжительность: 4:35
Опубликовано: 25 окт. 2020 г.

Air is a tasteless, odorless and invisible mix of gases that is primarily made up of oxygen and nitrogen. There are layers of air that cover the earth, which is ...

7 мар. 2022 г. · 3. People, animals and plants need air to live. 4. Air contains gases, water vapour, smoke and dust. 5. Smoke comes from fire, factories, cars ...

Trees make the air fresh and clean. Air is made of different gases like oxygen, carbon-di-oxide and so on. Moving air is called wind.

25 янв. 2021 г. · Air is mostly gas. The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.

What does air contain? Ans: Air contains Gases, water vapour, dust, snacks and germs. 2. Why do plants and animals need oxygen?