Why Does the Ratio of Oxygen 18 to Oxygen 16

question 56

Multiple Choice

Why does the ratio of oxygen 18 to oxygen 16 in the oceans increase during an ice age?

• A) More precipitated water remains on land instead of running back to the sea.
• B) There is a different kind of radioactivity occurring in the ocean at the colder world temperatures.
• C) There is a different kind of radioactivity occurring on land at the colder world temperatures.
• D) Sea water freezes into glaciers.

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Definitions:

Childbirth

The act of delivering a baby from the mother’s uterus to the outside world.

Expulsion

The act of being driven out or ejected from a place or institution, often as a consequence of one's behavior.

Placenta

is an organ that develops in the uterus during pregnancy, providing oxygen and nutrients to the growing baby and removing waste products from the baby's blood.

Doula

An experienced mentor who furnishes emotional support and information for a woman during labor.