How old is a bone that has 12.5% of the original amount of radioactive carbon-14 remaining?

• 5,700 years
• 11,400 years
• 17,100 years
• 22,800 years

According to the graph, what is the half-life of this isotope?

• 100 years
• 150 years
• 200 years
• 300 years

The surface temperature of which sample increased at the slowest rate?

• water
• basaltic sand
• copper pennies
• iron fragments

The average rate of temperature change, in Fahrenheit degrees per hour, between 6 a.m. and noon was

• 6 °/h
• 8 °/h
• 3 °/h
• 18 °/h

What is the density of this material?

• 1.0 g/cm3
• 5.0 g/cm3
• 10.0 g/cm3
  
• 20.0 g/cm3
  

How many joules are required to evaporate 1 gram of boiling water?

• 4
• 334
• 2260
• 2594

Which pie graph correctly shows the percentage of elements by volume in Earth's troposphere?

• 1
• 2
• 3
• 4

New York State’s Catskills are classified as which type of landscape region?

• mountain
• plateau
• lowland
• plain

The surface bedrock at which location is most likely to contain this fossil (Bothriolepis)

• Ithaca
• Old Forge
• Albany
• New York City

Which ocean current warms the climate of northwestern Europe?

• North Atlantic Current
• North Equatorial Current
• Canary Current
• Labrador Current