During What Part of the Moon's Life Were Most of the Craters

question 135

Multiple Choice

During what part of the Moon's life were most of the craters formed?

• A) between about 800 million and 1.5 billion years after the Moon formed
• B) during the first 800 million years
• C) approximately evenly from when the Moon first formed until the present day
• D) during the first 200 million years

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Definitions:

Aromatic C-H Stretch

A characteristic vibrational mode observed in infrared spectroscopy, typically occurring in the region of 3100 to 3000 cm^-1, indicative of aromatic hydrocarbons.

C Stretch

Refers to the carbon-hydrogen bond stretching vibration observed in infrared spectroscopy, indicative of specific organic functional groups.

Peaks

In the context of spectroscopy, refers to the points on a graph that represent the maximum absorption or emission of energy by molecules at specific wavelengths or frequencies.

Proton Spin Decoupled

A technique used in NMR spectroscopy where the coupling between proton spins is removed, simplifying the spectrum and making it easier to interpret.