Oxygen: Real-World Application and Its Role in Climate Change
Science
Grade 7
9 questions
~18 mins
1 views0 downloads
About This Worksheet
This worksheet explores the properties of oxygen, its importance in environmental processes, and how it relates to climate change. Students will review concepts, perform calculations, and analyze real-world scenarios involving oxygen.
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Oxygen: Real-World Application and Its Role in Climate Change
Subject: ScienceGrade: Grade 7
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Untitled Worksheet
Grade Grade 7
A
Introduction to Oxygen and Its Environmental Importance
Read the introduction carefully and answer the questions that follow.
1.
Oxygen is a colorless, odorless gas that is essential for many forms of life and plays a key role in combustion. Explain briefly how oxygen contributes to the process of respiration in humans.
[2 marks]B
Concept Review
Answer the following questions to review your understanding of oxygen's properties and tests.
1.
What is the chemical formula of oxygen gas?
[1 mark]2.
Describe the test used to identify oxygen gas in the laboratory.
[2 marks]C
Calculations Related to Oxygen
Solve the following numerical problems related to oxygen gas volumes.
1.
Calculate the volume of oxygen needed to completely burn 10 grams of methane (CH₄). Use the reaction: CH₄ + 2O₂ → CO₂ + 2H₂O. (Molar mass of CH₄ = 16 g/mol, and molar volume at room temperature = 24 L/mol).
[3 marks]D
Practical Skills and Safety
Consider the following experimental scenario and answer the questions.
1.
If you were to test for oxygen support in a laboratory, what safety precautions should you observe when handling gases and performing the test?
[3 marks]E
Data Analysis and Environmental Impact
Read the scenario below and answer the questions.
1.
Scientists have observed a decrease in atmospheric oxygen levels over a certain region. Describe how this change could impact local climate and living organisms.
[4 marks]F
Exam-Style Question
Answer the following question in detail.
1.
Explain how oxygen supports combustion and why this is important in understanding climate change. Include in your answer the role of oxygen in burning fossil fuels and its effect on greenhouse gases.
[6 marks]G
Real-World Applications of Oxygen
Answer the following questions to connect scientific concepts with real-world issues.
1.
Describe one industrial application of oxygen related to environmental management or climate change mitigation.
[2 marks]2.
Fill in the blank: Increasing the efficiency of oxygen use in combustion engines can help reduce ____________, which contributes to climate change.
[1 mark]Quick Actions
What is Remix?
Create a new worksheet based on this one. Change the grade level, topic, number of questions, or difficulty - then generate a fresh version.
- • Change grade level (Grade 6 → Grade 7)
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Details
- Created
- 1/1/2026
- Updated
- 1/1/2026
- Type
- worksheet