IB Biology – Water Study Guide Test.
Polar molecule - CORRECT ANSWER molecule with regions of positive and negative charge
Oxygen Atom (in water) - CORRECT ANSWER region of a water molecule that is negatively charged
Hydrogen Atoms (in water) - CORRECT ANSWER regions of a water molecul...
Polar molecule - CORRECT ANSWER molecule with regions of positive and negative charge
Oxygen Atom (in water) - CORRECT ANSWER region of a water molecule that is negatively charged
Hydrogen Atoms (in water) - CORRECT ANSWER regions of a water molecule that are positively charged
Capillary action - CORRECT ANSWER ability of water molecules to creep up surfaces due to their polarity
(e.g., up plant stems, meniscus in a graduated cylinder)
Hydrogen bonds - CORRECT ANSWER attractive force between a positively charged hydrogen of one
molecule and a negatively charged atom of a different molecule
Solution - CORRECT ANSWER mixture in which one or more substances (solutes) are distributed evenly
or dissolved in another substance (solvent)
Solvent - CORRECT ANSWER substance in which a solute is dissolved
Solute - CORRECT ANSWER substance being dissolved in a solvent
pH - CORRECT ANSWER scale used to measure of how acidic or basic a solution is; ranges from 0-14
Acid - CORRECT ANSWER substances with a pH less than 7; any substance that forms hydrogen ions (H+)
in water
Base - CORRECT ANSWER substances with a pH greater than 7; any substance that forms hydroxide ions
(OH-) in water
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