Question

water: a cool molecule
teen channel: science scene
while walking to school one
morning, you observe
sparkling dewdrops on a
spiderweb and stop to marvel
at their shape, becoming
completely absorbed in their
scintillations...until you notice
drops of water from the sky
splashing on your head,
sending you scurrying for
shelter. since water is all
around us, you might not
spend much time
contemplating why it acts the
way it does, but water has
many fascinating properties
the shape of water molecules helps water drops form.
question 2
according to the article, what causes water molecules to join
together?
a. the molecule has a perfectly spherical shape.
b. the molecule has opposite charges on each end.
c. the atoms in the molecule are chemically bonded.
d. the atoms in the molecule spread apart when frozen.
submit
extras

Explanation:

To determine what causes water molecules to join together, we analyze each option:

• Option A: Water molecules are not perfectly spherical; they have a bent shape, so this is incorrect.
• Option B: Water is a polar molecule, meaning it has a partial positive charge on the hydrogen end and a partial negative charge on the oxygen end. These opposite charges (dipole - dipole interactions, specifically hydrogen bonding due to the polarity) cause water molecules to be attracted to each other and join together. This is correct.
• Option C: While atoms in a water molecule (H and O) are chemically bonded (covalent bonds), this bonding holds the atoms within a single molecule, not what causes different water molecules to join together. So this is incorrect.
• Option D: The spreading of atoms in a water molecule when frozen (expansion of water upon freezing) is related to the structure of ice, not what causes water molecules to join together in general (like in liquid water or during condensation). So this is incorrect.

Answer:

B. The molecule has opposite charges on each end.