Question

Fill in the blanks:
(i) The layer of air around the earth is known as ___.
(ii) The component of air used by green plants to make their food, is ___.

Answer 1

(i) The layer of air around the earth is known as atmosphere. Atmosphere consists of various gases such as Nitrogen, Oxygen, etc.

(ii) The component of air used by green plants to make their food is carbon dioxide. Plants utilise carbon dioxide, sunlight and water to make their food and release oxygen into the atmosphere in the process. This process is called Photosynthesis.