They are know as Maria's! Hope it helps you on the science test your cheating on! ;)
Dark maira of seas
Galileo called the dark flat parts on the moon "seas" or "maria" in Latin, although they are now known to be basaltic plains formed by ancient volcanic activity.
Maria, or "seas", which is what "maria" means.
He thought they were seas. He called them maria (Latin for sea). Today scientists still call the dark, flat parts maria. Marias were formed when magma flowed through the surface of the moon. The magma cooled and became flat and dark.
Flat regions of dry lava on the surface of the moon are called maria. They are large dark basins formed by ancient volcanic activity and are visible from Earth as dark areas on the lunar surface.
The dark-colored, relatively flat regions of the Moon's surface are called lunar maria. These maria were formed when basins on the Moon were filled with basaltic lava following impact events in the past.
The dry flat regions of lava on the moon are called maria. These are large dark plains formed by ancient volcanic eruptions filling in low-lying areas on the moon's surface.
When Galileo looked through his telescope at the moon, he saw dark, flat parts of the moon's surface which he called maria.
These dark flat areas are called lunar maria, which are large basaltic plains formed by ancient volcanic activity. They have lower elevation compared to the surrounding highlands and were formed billions of years ago by lava flows filling in large impact basins.
The dark flat areas found on the surface of the moon are called maria, which is the Latin word for "seas." They were formed by ancient volcanic activity and are lower in elevation than the surrounding highlands.
The broad flat plains on the moon are called lunar maria. They are large dark areas on the moon's surface formed by ancient volcanic activity. Mare Tranquillitatis, Mare Imbrium, and Mare Serenitatis are some well-known lunar maria.
It is called a "mare", or sea.