Half Life/Radioactivity
What fraction remains after 3 half lives?
What is 1/8.
See figure 1. Put the layers in order, oldest to youngest.
D C B A
Gaps in rock sequences
Unconformities
What is the break down of a radio active isotope called
Radioactive decay
What ancient civilization started the tradition of Valentine's Day?
Rome
A sample of radioisotope has a mass of 5 grams after 10 days. If the half life is 2 days long, how much of the sample was there originally?
What is 160 grams.
See figure 2. Put the layers in order, oldest to youngest.
E A D C B
When horizontal layers of sedimentary rock are tilted and uplifted, then erosion wears down the rock layers
Angular unconformities
What is absolute age
Determining the actual age of an event or object in years called.
Which Roman God is Cupid the son of?
Venus
A sample of radioisotope has a mass of 400 grams. After 20 days, 12.5 grams of the sample remains. What is the half-life of the isotope?
What is 4 days.
See figure 3. Put the layers in order, oldest to youngest.
A C B
When all the layers are parallel but yet there is still a gap
Disconformity
What is the ratio of carbon a plant absorbs?
C-12 to C-14
Which chocolate company (sold in Thailand) created the first box of chocolates?
Cadbury
The initial mass of a radioisotope is 10 grams. If the radioisotope has a half-life of 2.75 years, how much remains after 4 half-lives?
What is 0.625 grams
See figure 4. Put the layers in order, oldest to youngest.
E C B D A
When metaphoric or igneous rocks are uplifted and them eroded
Nonconformity
When A plant or animal dies does the ratio of carbon-14 to carbon-12 increase or decrease
C-14
Between wives, mothers, teachers, and children, who statistically receives the most Valentine's Day cards?
Teachers ( :
Technetium-104 has a half-life of 18 minutes. How much of a 165 gram sample remains after 90 minutes?
What is 5.15625 grams or ~ 5.2 grams
See figure 5. Put the layers in order, oldest to youngest.
L K J I H G F E D M C B A
Says that in undisturbed layers of rock, the oldest rocks settle on the bottom and new rocks settle on the top
Principle of Superposition
What type of material can we use radiocarbon dating to find the absolute age of?
Organic
Why is February 14th Valentines Day?
This was the day St. Valentine was beheaded for helping Christian couples wed in Rome.