By time......................
I'm sorry but can you be a bit more specific on these following observations?
The mass of an object stays the same no matter what you do to it.
The moon's surface is covered with dead volcanoes, impact craters, and lava flows, some visible to the unaided stargazer. Early scientists thought the dark stretches of the moon might be oceans, and so named such features mare, which is Latin for "seas"
<span>Yes. The pollen DNA matches the pollen found at site C.</span>