A LG7&8 Gizmo Half-life SE.pdf - Name Date Student...

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Name: Date: Student Exploration: Half-life Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: daughter atom, decay, Geiger counter, half-life, isotope, neutron, radiation, radioactive, radiometric dating Prior Knowledge Questions (Do these BEFORE using the Gizmo .) 1. Have you ever made microwave popcorn? If so,
what do you hear while the popcorn is in the microwave? 2. If you turn the microwave on for two minutes, is the rate of popping always the same, or does it
change? Explain. Gizmo Warm-up Like an unpopped kernel in the microwave, a radioactive atom can change at any time. Radioactive atoms change by emitting radiation in the form of tiny particles and/or energy. This process, called decay , causes the radioactive atom to change into a stable daughter atom . The Half-life Gizmo allows you to observe and measure the decay of a radioactive substance. Be sure the sound is turned on and click Play ( ). 1. What do you see and hear? I see the red radioactive atoms turn into grey daughter atoms. And each time the atom is transformed, a lightning bolt of energy is shown and it is a clicking sound that I hear.
2. What remains at the end of the decay process?
3. Is the rate of decay fastest at the beginning,
middle, or end of the process? Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved
Activity A: Decay curves Get the Gizmo ready: Click Reset ( ). Be sure that User chooses half-life and Random decay are selected.

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