Explain how the age of a rock can be determined by radiometric dating
What will be an ideal response?
The minerals in rocks contain small amounts of radioactive isotopes (for example carbon-14 or potassium-40). Over time, these isotopes decay into a different, stable element. By precisely counting the atoms of the original isotopes and decay products within a rock, and knowing the decay time (the half-life) of the radioactive isotope, the age can be determined.
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The most massive subatomic particle is the
A) electron. B) proton. C) neutron. D) nucleus.
A hot pizza contains
a. heat b. internal energy c. temperature d. work e. none of the above
Shallow Landslides
What will be an ideal response?
The equivalent resistance of any series of resistors in a circuit is
A) often less than the resistance of the lowest resistor. B) always less than the resistance of the lowest resistor. C) usually half the value of the lowest resistor. D) none of the above