Definitions
Isotopes
Half Lives
Extras
Absolute VS Relative Dating
100

Decay

To decrease, dissapear, fade away

100

What happens to parent isotopes? daughter isotopes?

Parent decays daughter grows
100

What % is ONE half life?

50%

X2 if you can rap any clean song of your choosing

100
Do isotopes decay for a little and then randomly stop? Or is the parent always constantly decaying 

constant 

x3 if someone at the group does 10 push ups 

100

What is the difference between absolute vs relatative dating?

Absolute - exact

Relative - comparing

X 3 points if you reenact a famount tiktok/meme

200

Radiometric dating

Using isotope decay to date materials


X2 points if you can tell me a knock knock joke

200

Carbon decays into (what is carbon's daughter?)

nitrogen

X2 points if someone in their group brought their computer charger to school

200

Starting with zero half lives, what % of the half lives remain in the chart:

Half lives    |    % Remaining

0

1

2

3

100, 50,25,12.5

200

Explain the difference between the rate of decay for carbon VS uranium. 

Carbon decays super fast, uranium super slow - use uranium to date old things 

200

1) Jimmy and Timmy ask each other who is younger or older based on their birthday.

relative

300
cross cutting relationships

cuts across rocks are younger

300

Isotopes decay at a random rate

True or False

False they are constant

300

At which half life is there is exactly 50% of the parent and 50% of the daughter isotope?

first

X2 Points if you gargle water while singing a song of your choice

300

How did the twizzler lab represent radiometric dating?

Best response accepted

300

2) Jimmy tells Timmy that he is 14 years old.

Absolute

400

relative dating

dating rocks using comparative terms like older or younger

400

All isotopes take the same amount of time to decay

true or false

false

400

How do you find the amount of years an object is based on a decay chart? What do you do with the half lives given?

Multiply the first half life by the # of half lives provided or divide by the number of half lives provided if it is not the first half life.

400

Which of the following answers is an example of absolute age? 


  • Scientist measure the amount of radioactive material to determine the age of a fossil embedded in rock. 
  • Scientist find that a fault that cuts across rock layers happened much later than the formation of the rock itself. 
  • Scientist find that grains in a rock are older than the actual rock itself. 
  • Scientist determined that two fossils formed at different times by comparing them. 

A. (radioactive material)

400

3) Scientists determine that the age of a rock is 1.2 billion years old using testing methods.

absolute 

500

Isotope

different variations of the same element

500

Which element would you use to date super old items, carbon or uranium? Why?

Uranium, it stays in an object longer than carbon and takes a longer time to decay
500

After THREE half lives, uranium is 3.9 billion years old. What is the FIRST half life?

1.3 billion

500

If the THIRD half life of an element is 600 years, what is the FIRST half life?


200 years

500

4) Scientist compare the ages of two layers of rock to determine which formed first.

relative

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