ENCOURAGEMENTA4-1 QUESTION V

10. ENCOURAGEMENTA4-1 Question V: Choose the word or phrase which best completes each blank in the following passage (10 pts):Take a really deep breath. Feel how your chest gets bigger (1)_______ .Your chest gets bigger (2)_______ your lungs are filling up with air. You cannot see air, but air is all around you. You can feel it (3)_______ the wind blows.Air is a mixture of (4)_______ different gases. The main gases in the air are nitrogen, oxygen, and argon. Air also (5)_______ smaller amounts of hydrogen, carbon dioxide, water vapor, helium, and other gases. Oxygen is (6)_______ important gas for animals. Animals (7)_______ breathe oxygen in order to live.Carbon dioxide is the most important gas for plants. Plants use carbon dioxide and sunlight (8)_______ food. Plants (9)_______ oxygen. Animals turn the oxygen back into carbon dioxide when they breathe. The earth’s atmosphere is (10)_______ air. An atmosphere is made up of the gases that surround a planet.