What is the difference between primary scale and extension scale?

The primary scale is used for measuring whole units--kilometers, statute miles, or nautical miles. The extension scale is to the left of the primary scale, and is used for measuring fractions of units

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Explanation:

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organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.