Decay Equations: Real-World Application in Space Exploration
Science
Year 9
9 questions
~18 mins
1 views0 downloads
About This Worksheet
This worksheet explores decay equations within the context of space exploration, helping students understand how radioactive decay is used in space technology and scientific missions. It covers fundamental concepts, calculations, practical considerations, data interpretation, and real-world applications.
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Decay Equations: Real-World Application in Space Exploration
Subject: ScienceGrade: Year 9
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Untitled Worksheet
Grade Year 9
A
Introduction to Radioactive Decay in Space Exploration
Read the following introduction and answer the questions that follow.
1.
Radioactive decay is the process by which unstable atomic nuclei lose energy by emitting radiation. In space exploration, radioactive materials are used for power sources and scientific measurements. Explain briefly why understanding decay equations is important for space missions.
[3 marks]B
Concept Review
Answer the following questions to review your understanding of decay mechanisms.
1.
Define the term 'half-life' in the context of radioactive decay.
[2 marks]2.
Describe the basic form of the decay equation for a radioactive isotope.
[2 marks]C
Calculations Involving Decay
Solve the following numerical problems related to decay equations.
1.
A radioactive isotope used in space probes has a half-life of 30 years. How much of a 100 g sample remains after 90 years? (Use N = N0 * (1/2)^(t / T1/2))
[4 marks]2.
Calculate the decay constant λ for a radioactive isotope with a half-life of 15 years.
[4 marks]D
Practical and Theoretical Skills
Answer the following questions based on theoretical understanding of experiments involving decay.
1.
Describe a simple experiment to measure the half-life of a radioactive isotope in a laboratory setting, including safety precautions.
[6 marks]E
Data Analysis and Interpretation
Interpret the following scenario related to space technology and radioactive decay.
1.
A radioactive power source for a Mars rover has a decay constant of 0.0005 yr^-1. How long will it take for the power output to decrease to 75% of its original value?
[4 marks]F
Application in Space Missions
Answer the following questions about real-world applications of decay equations in space exploration.
1.
Explain how radioactive decay is utilised in radioisotope thermoelectric generators (RTGs) for powering spacecraft.
[3 marks]2.
Identify one safety concern related to using radioactive materials in space technology and how it can be mitigated.
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Details
- Created
- 1/1/2026
- Updated
- 1/1/2026
- Type
- worksheet