What Did Radar Astronomers Find in the Polar Regions of Mercury

question 30

Multiple Choice

What did radar astronomers find in the polar regions of Mercury?

• A)rift valleys
• B)large mare basins, such as near our Moon's south pole
• C)water ice that never melts in the deep craters
• D)polar caps of dry ice that vary seasonally, much like Mars
• E)auroral displays much like Earth's

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Definitions:

Neural Tube Defects

Birth defects of the brain, spine, or spinal cord that occur due to incomplete development of the neural tube during early pregnancy.

Amniocentesis

A medical procedure used in prenatal diagnosis to extract a small amount of amniotic fluid for the testing of chromosomal abnormalities in a fetus.

Prenatal Screening

Medical tests and procedures used to evaluate the health of a fetus and identify any potential genetic, congenital, or health issues before birth.

Amniocentesis

A medical procedure used in prenatal diagnosis to sample amniotic fluid using a needle inserted into the uterus, to test for fetal abnormalities and infections.