SMALL, YES, BUT MIGHTY:THE MOLECULE CALLED WATER

Based on article of this title by:

Angier, N., The New York Science Times, July 2007

People vacation near……

Fetuses gestate in….

% MASS OF

WATER IN

HUMANBODY

WEIGHTaverage

s

Without water, we will die of thirst in _______

days

Life on earth arose in….

A large part of the search for extraterrestrial life is a search for…..

Many of water’s unique properties are a result of itsintermolecular

bonding. The name of this bond is

_________________ bonding.

The hydrogen bonds cause water molecules to become “_______________.” Why is this important in plants?

Water acts very differently from other

_____________ molecules. It has surprisingly high boiling and melting points.

For example, water is a _____________at room temperature.

H2S CO2 CH4 NH3 CO SO2

These other small molecules are all

____________________ at room temperature

Water has a huge range in temperatures in which it is a

______________. Why does this matter?

This means that most of our world is

_________________________

Earth’s oceans and lakes slowly soak up huge quantities of ________________ during the day and slowly release it at night. Why does this matter?

Think about deserts, where there is no water, even not much water vapor in the air. What are the days like? What are the nights like?

The oceans cover _______% of the earth’s surface. They keep the earth COOL WARMin summer,andCOOL WARMin winter.

Water is known as the

____________________ solvent. Is it really this? YES NOHowever,TRUE FALSE Water can dissolve more substances than any other compound.

Most substances get more dense when they freeze. Water gets ___________ dense!

This fact is essential for life as we know it. Why?