AQA Trilogy GCSE Science Science
Mission Objectives
Define the count rate of a radioactive source.
Explain what is meant by the half-life of a radioactive source.
Calculate count rates after a given number of half-lives (Higher tier only).
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Words and meanings to learn
Half-life
The time it takes for half of a radioactive substance to decay.
Radioactive decay
The process by which an unstable atomic nucleus loses energy by emitting radiation in the form of alpha, beta particles, or gamma rays, leading to the transformation into a more stable nucleus
Becquerel (Bq)
is a unit used to measure radioactivity. It represents the number of nuclear decays per second.
activity
The rate at which a sample of radioactive material undergoes decay, measured in becquerels (Bq), where 1 Bq equals one decay per second.
Count rate
the number of radioactive decays detected per second by a radiation detector, such as a Geiger counter.
Samantha is a dedicated and accomplished science educator with over 15 years of leadership experience in the field, coupled with a strong background in scientific analysis. She has a proven track record of strategically managing educational departments, driving operational efficiencies, and nurturing collaborative relationships with stakeholders.
Samantha previously served as the Head of Chemistry and Sixth Form Tutor, Ilkley Grammar School, Ilkley with extensive Key Stage 4 and 5 teaching experience and leadership. In addition to her teaching and leadership roles, she is also an examiner for AQA, providing her with valuable insight into assessment standards and exam specifications.
In her spare time, Samantha enjoys playing the accordion with her local orchestra and has recently taken up cricket, where she's enthusiastically honing her skills both on and off the pitch!
Simulation: Phet simulation
Dice, smarties, counters, measuring cylinders
Expert film
Mission assignment film
