Answer:
your question is long but the points are less
Explanation:
2. (carbon dioxide ) a
3. Nitrogen (N2), which makes up about 78% of air. Oxygen (O2) is the second most abundant gas at about 21%. (nitrogen )b
4. (air pressure ).c
5. (burn more rapidly)b
6. (oxygen and carbon dioxide)a
7. (exerts pressure )c
8. (carbon dioxide)a
9. (argon)c
10. (photosynthesis)d
1. respiration=the act or process of breathing the inhaling of oxygen and the exhaling of carbon dioxide. the process by which cells use oxygen to break down sugar and obtain energy> It is called respiration.
photosynthesis= Photosynthesis is the process by which plants make their food using carbon dioxide, water, and sunlight.
noble gas= any of a group of rare gases that include helium, neon, argon, krypton, xenon, and usually radon and that exhibit great stability and extremely low reaction rates. called also inert gas.
2. we know air exists because first of all, we breathe it every day and it's necessary for most things living on this earth. You can prove air exists by blowing up a balloon. By doing this, it proves that air has weight and air takes up space. Lastly, the air is just made up of mainly nitrogen and oxygen so air is an object
3. Air is present all around us. We cannot see the air around us but we can feel its presence when the leaves rustle or branches sway. birds fly in the air it's an indicator of air. we breathe in and out we are also an indicator of air.
4. =blowing the balloon
=breathe in and out
=photosynthesis
= energy supplies
=maintaining temperature
5. Nitrogen (78%), Oxygen (21%), Argon (1%), Carbon-di-oxide (0.03%), and water vapor. Air also has some other gases but they are in very minute percentage.
