Question

Which of these Earth events was dated using the most valid and reliable source of information?
millipede appears
land mammals appear
rodents appear
insects appear
Question 5(Multiple Choice Worth 1 points)
[GT.02]A scientist kept 1,000 grams of a radioactive material in a container. After 66 days, he observed that 125 grams of the radioactive material was left in the container. Based on the observation, which of these is the most likely inference drawn by the scientist?

About 500 gram of the material decayed in 33 days.
About 500 gram of the material decayed in 44 days.
About 62.5 gram of the material will be left in the container after 88 days.
About 62.5 gram of the material will be left in the container after 110 days.
Question 6(Multiple Choice Worth 1 points)
[GT.02]The diagram below shows four layers of rocks.

Picture showing four layers of rocks labeled A, B, C, and D from the bottom to the top.

Which of these layers of rock is the youngest?

Layer A
Layer B
Layer C
Layer D
Question 7(Multiple Choice Worth 1 points)
[GT.02]The Law of Superposition is a/an

creative method to date rocks.
unreliable method to date rocks.
biased explanation for how rocks were formed.
elaborate explanation for how rocks were formed.
Question 8(Multiple Choice Worth 1 points)
[GT.02]Which of these provides the most creative explanation for why sediments form horizontal and parallel layers?

Law of Superposition
Law of Unconformities
Principle of Uniformitarianism
Principle of Original Horizontality
Question 9(Multiple Choice Worth 1 points)
[GT.02]Which of these forces affects the rate at which a radioactive material decays?

electrical forces
magnetic forces
nuclear forces
gravitational forces
Question 10(Multiple Choice Worth 1 points)
[GT.02]Which of these is most likely a characteristic of a non-radioactive daughter isotope after it is formed from the parent isotope?

stable electrons
stable nucleus
positively charged atom
negatively charged atom
Question 11(Multiple Choice Worth 1 points)
[GT.02]The table below shows the half-lives of four radioactive materials.


Radioactive material Half-lives
Iodine-131 8.07 days
Sodium-24 15 hours
Bismuth-212 60.5 seconds
Strontium-90 29 years

Based on the table, which of these best orders the materials from the slowest to the fastest rate of decay?
Iodine-131 → Sodium-24 → Strontium-90 → Bismuth-212
Bismuth-212 → Strontium-90 → Sodium-24 → Iodine-131
Bismuth-212 → Sodium-24 → Iodine-131 → Stro