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Answer: Potassium-40 decays into argon gas over time.
Explanation: Potassium-argon dating is a dating method used to determine the age of sedimentary rocks by comparing the proportion of K-40 to Ar-40 in a sample of rock, and knowing the decay rate of K-40.
Potassium-40 undergoes decay following first order kinetics as given below:

If this follows the normal format for genetic trees, its neither, as a circle is a female, not a male. If it is a female, then it would be a female with one recessive gene.
Answer:
I think that it's false
Explanation:
The reason is because there is a thing called a 'Water Cycle'. It is basically the continuous movement of water on the surface of the Earth.
P.S. if I get it wrong, forgive me
Answer:
The answer is 1:1:1:1:1:1:1:1.
Explanation: