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Atomic Structure
Absolute Dating
Relative Dating
Half Life Problems
Random
100

______ Have a positive charge, ________ have a negative charge, and ________ have no charge

protons, electrons, neutrons

100

Give an example of a statement which reflects absolute dating about a rock.

Answers will vary

This rock is 100 years old.

100

Give an example of relative dating about a rock.

This rock is older than that rock.

100

After 2 half-lives what percent of a radioactive sample remains?

25%

triple points

100

Which subatomic particles are found in the nucleus?

protons and neutrons

steal 100 points from another team

200

Look at your periodic table. Which element has 14 protons?

Silicon

200

The amount of time is takes for half of a radioactive sample to decay is a(n)

half-life

200

Rocks on the bottom are older than rocks on the top. This is due to which law or principle?

Principle of superposition

Collect 300 points instead of 200

200

You are looking at a 50 gram sample of Carbon-14. How many half lives will pass before the mass is 6.25 grams? 

3 Half-lives

200

When an element has a charge because it has an uneven amount of electrons it is called a(n)

ion

300

Which two subatomic particles are needed to calculate atomic mass?

protons and neutrons

300
Radioactive samples are unstable because they are _______________ (they have a normal amount of protons and an abnormal amount of neutrons)

isotope

300

Curved rocks are ________ that flat rocks, and this is supported by the principle of ____________________.

older; original horizontality 

steal 300 points from another team

300
Imagine you have 40 grams of a radioactive substance that has a half-life of 30 years. How much mass would remain after 120 years?

2.5 grams

300

When smaller rocks are inside another rock we can assume the smaller rocks are ____________ than the rock which surrounds them because of the principle of __________________.

older; inclusions

Only the team who chose this category collects the points

400

How many neutrons does Francium have?

136

400

If a rock is 3 million years old, what element can be used to date it?

Uranium

double points

400
Look at the picture drawn on the board which corresponds to the question. Put these layers in order from oldest to youngest.

A,C,D,B,E,F

400

Imagine you have 500 grams of a radioactive sample that has a half-life of 120 years. How much time will pass by the time there is 62.5 grams left?

360 years

steal 200 from 2 different teams or 400 from 1 team

400

If two chlorine atoms are bonded together, what kind of bond would that be?

covalent
500

Imagine Boron has a charge of -2. How many electrons does it have?

7

go again

500
Which isotope could be used to date human fossils?

Carbon-14

500
Look at the question on the board which corresponds with the question. Which shape could represent a good index fossil?

the circle

500

You currently have 5 grams of a radioactive substance that has a half life of 10 years. How long ago was there 80 grams?

40 years

double points

500
Look at the board for the corresponding question. Which type of unconformity is shown?

angular