Shaping the Earth by DH Patent and William Munoz
Geology by Barbara Murck
Vocabulary Added:
radioactive decay: how chemical elements change the atomic number of their nuclei
half-life: the time it takes for the number of parent atoms to reduce by half
Discussion:
How radioactive isotopes are like clocks
Activity:
Pretend an ice cube is a uranium 238. Put it on a a plate and let it melt. Time it till it is half gone. Now use another ice cube of the same size as a "clock" to time another activity.
No comments:
Post a Comment