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Water: The Molecule That Makes Life Possible

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Water is one of the most remarkable substances on Earth, and scientists have studied it for centuries trying to understand its secrets. Every living thing — from the tiniest MICROBE to the largest blue whale — needs water to survive. A water MOLECULE is made of two hydrogen atoms bonded to one oxygen atom, which gives it the CHEMICAL formula H₂O. This simple structure creates some truly extraordinary PROPERTIES that make water unlike almost any other liquid on the planet. Water is so essential to life that when scientists search for life on other planets, the first thing they look for is EVIDENCE of water.

A water molecule is made of two hydrogen atoms and one _____ atom.
OXYGEN
The chemical formula for water is _____.
H₂O
Name something from the hunk that needs water to survive.
MICROBES / BLUE WHALES / LIVING THINGS
When searching for life on other planets, scientists first look for evidence of _____.
WATER
Name something the text tells us about a water molecule.
TWO HYDROGEN ATOMS / ONE OXYGEN ATOM / FORMULA H₂O
The element oxygen has the atomic symbol _____.
O

Writing Prompt

What's your take on water being the first thing scientists look for when searching for life on other planets?

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