Day Starter
Objective: Students will make conclusions and recall information about geological history on the Unit 4 CST and TST.
Question:
1) How has Earth changed during our current era?
2) How many years ago did ancient humans appear?
3) Carbon-14 has a half-life of 5,730 years. How long does it take a 200-gram sample of carbon-14 to decay to a mass of 100 grams?
