-Based on the Graph, If 35% of the Original 40K

question 110

Multiple Choice

-Based on the graph, if 35% of the original 40K remains in a sample of basalt, what is the approximate age of the rock?

• A) 1 billion years old
• B) 2 billion years old
• C) 3 billion years old
• D) 4 billion years old
• E) 5 billion years old

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Definitions:

Dermal Gills

Respiratory structures in some aquatic animals that allow for gas exchange directly through the skin.

Book Lungs

Respiratory organs in certain arachnids, such as spiders and scorpions, consisting of stacked plates for gas exchange.

Operculum

In bony fishes, a protective flap of the body wall that covers the gills.

Swim Bladders

Gas-filled sacs in fish that help maintain buoyancy in the water column.