can you answer these all please urgent
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1. Air is composed of 78 percent nitrogen, 21 percent oxygen and the other one percent represents all the other gases like carbon dioxide, argon, helium, etc.
2. Light two candles, place one where there is air and place one in a glass jar, not allowing air to enter. The one in the jar will burn out first as there is no air (oxygen) to support it anymore.
3. When you boil water, you see bubbles forming, this is the dissolved air in the water.
4. A lump of cotton wool looks fluffy because it has a lot of air spaces. When it is put in the water, the air escapes and the water takes the air’s place, making it look less fluffy.
5. A) photosynthesis
B) fluid, rigid
C) atmosphere
D) space, has mass
E) slimy skin
F) nitrogen, oxygen
G) transpiration
2. Light two candles, place one where there is air and place one in a glass jar, not allowing air to enter. The one in the jar will burn out first as there is no air (oxygen) to support it anymore.
3. When you boil water, you see bubbles forming, this is the dissolved air in the water.
4. A lump of cotton wool looks fluffy because it has a lot of air spaces. When it is put in the water, the air escapes and the water takes the air’s place, making it look less fluffy.
5. A) photosynthesis
B) fluid, rigid
C) atmosphere
D) space, has mass
E) slimy skin
F) nitrogen, oxygen
G) transpiration
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