The Formula of Water,H₂O,suggests

question 28

Multiple Choice

The formula of water,H₂O,suggests

• A)there is twice as much mass of hydrogen as oxygen in each molecule.
• B)there are two oxygen atoms and one hydrogen atom per water molecule.
• C)there is twice as much mass of oxygen as of hydrogen in each molecule.
• D)there are two hydrogen atoms and one oxygen atom per water molecule.
• E)none of these

---

Definitions:

Mass Extinction

A significant and widespread event in which a substantial proportion of Earth's species die out in a relatively short geological period.

Climate Change

Substantial changes in global or regional climate patterns, notably since the late 20th century, largely attributed to increased levels of atmospheric carbon dioxide produced by fossil fuels.

End-Permian Extinction

The largest mass extinction event in Earth's history, occurring around 252 million years ago and resulting in the extinction of a significant proportion of marine and terrestrial species.

UV-B Radiation

A portion of the ultraviolet spectrum with wavelengths from 280 to 315 nanometers, known for its biological effects, including DNA damage and vitamin D synthesis in skin.