Relative / Absolute Dating, and Intro to Earth Science Practice

What is the half-life of iodine-131?

• 32 days
• 8 days
• 16 days
• 24 days

Tags

NGSS.HS-PS1-8

What is the Half life of this isotope?

• 5 seconds

• 10 seconds

• 15 seconds

• 20 seconds

Tags

NGSS.HS-PS1-8

Which of the following is the oldest?

• Layer L
• Intrusion D
• Intrusion H
• Layer E

Tags

NGSS.MS-ESS1-4

The rock formation labeled "P" is a(n)...

• fault
• intrusion
• inclusion
• unconformity

Tags

NGSS.MS-ESS1-4

Which of the following correctly lists the layers in order from oldest to youngest?

• A, B, C, D, E
• E, B, C, D, A
• E, D, C, B, A
• C, B, A, D, E

Tags

NGSS.MS-ESS1-4

Which layer is OLDER? Intrusion M or Layer D?

• Intrusion M

• Layer D

Tags

NGSS.MS-ESS1-4

What element is usually used to date fossils?

• uranium-235
• carbon-14
• mercury-203
• thorium-234

A fossil is found beneath a layer of rock. If 12.5% of the fossil's Carbon-14 is remaining and Carbon-14 has a half-life of 5730 years, how old is the fossil?

• 5730 Years

• 11,460 Years

• 17,190 Years

• 22,920 Years

• 28,650 Years

A fossil is determined to be 22,920 years old based on Carbon-14 dating. Carbon-14 has a half-life of 5,730 years. What percentage of Carbon-14 is remaining in the fossil?

• 50%

• 25%

• 12.5%

• 6.25%

• 3.125%

Tags

NGSS.MS-PS1-2

A fossil composed of 200 g of radioactive material undergoes 1 half life. What is the percentage of radioactive material remaining?

• 100%

• 50%

• 25%

• 12.5%

• 3.125%