Answer:
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Explanation:
Often, the rock layers bookending the mass extinction are noticeably different in their compositions. These changes in the rocks show the effects of environmental disturbances that triggered the mass extinction and sometimes hint at the catastrophic cause of the extinction.
Explanation:
The nucleus us made up of protons
What does the electronegativity of an atom indicate?
D. The energy required to gain or lose an electron.
diffract through an open doorway in order to propagate into the hallway.
The lightbulb is connectd to the positive charge side of the battery, but the wire
is not connected to the negative charge side
