1 (a) Plants release oxygen into the atmosphere - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2019 - Paper 1
Question 1
1 (a) Plants release oxygen into the atmosphere.
What is the name of the process that releases oxygen into the atmosphere?
A combustion
B oxidation
C photosynthe... show full transcript
Worked Solution & Example Answer:1 (a) Plants release oxygen into the atmosphere - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2019 - Paper 1
Step 1
What is the name of the process that releases oxygen into the atmosphere?
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Answer
The process that releases oxygen into the atmosphere is called photosynthesis. In photosynthesis, plants convert carbon dioxide and water into glucose and oxygen, using sunlight as energy.
Step 2
Complete the bar chart by showing the percentage of oxygen in the atmosphere.
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Answer
To find the percentage of oxygen in the atmosphere, we know that the atmosphere contains 21% oxygen. Therefore, the incomplete bar chart should reflect this value.
Percentage of Oxygen: 21%
Bar Chart Filling: The bar for oxygen should be drawn up to the 21% mark, clearly indicating its proportion relative to nitrogen (78%) and other gases (1%).
