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Questions and Answers
What is the main aim of the activity described in the text?
What is the main aim of the activity described in the text?
- To demonstrate how to fill a bottle with water
- To explain the process of photosynthesis
- To prove that air occupies space (correct)
- To show the presence of water in an empty bottle
Why does water rush into the empty bottle when it is tilted according to the text?
Why does water rush into the empty bottle when it is tilted according to the text?
- Because the water is attracted to the bottle's shape
- Because the bottle is submerged in water
- Because the bottle is made of a special material that attracts water
- Because air rushes out from the opening of the bottle, creating a vacuum (correct)
What percentage of oxygen does air contain according to the text?
What percentage of oxygen does air contain according to the text?
- Nearly 100%
- About 78%
- Around 50%
- Approximately 21% (correct)
Why does nitrogen not support burning unlike oxygen according to the text?
Why does nitrogen not support burning unlike oxygen according to the text?
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