The term molecular weight is strictly correct for which of the following?
A) ionic compounds
B) covalent compounds
C) both a and b
D) neither a nor b
B
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Why does a potassium-argon dating time scale reset during heating?
A) Expansion of the crystal structure may permit the loosely caged argon atoms to escape. B) Reduction of the crystal structure may permit the loosely caged argon atoms to escape. C) It gets so hot that it throws off the time scale. D) This does not happen.
The Pleistocene Epoch (10,000 to 1.6 million years ago) is the glacial age of the geological time scale
But is that the end of the story? What does the long-term pattern suggest in terms of the potential for future glaciation? What will be an ideal response?
Three scientific principles of sustainability of life on this planet are dependence on solar energy, biodiversity, and chemical cycling.
Answer the following statement true (T) or false (F)
If a parcel starts with a temperature of 20 °C and is lifted 1 km into the air, the parcel is stable if ______.
A) the parcel is dry and the environment temperature at 1 km is 11 °C B) the parcel contains a cloud and the environment temperature at 1 km is 11 °C C) the parcel is dry and the environment temperature at 1 km is 9 °C D) the parcel contains a cloud and the environment temperature at 1 km is 9 °C