IB Biology Water

What property of water makes it the 'universal solvent'?

• it is a polar molecule

• it is an ionic compound

• it contains hydrogen bonds

• it steals electrons from other atoms

Which of the following best describes a result of the polar nature of water molecules?

• Ionic compounds dissolve easily in water

• The volume of water decreases by nearly half when it is frozen

• Water molecules repel each other

• Water molecules repel most other substances

Why does water ice have a lower density than liquid water?

• Because it floats

• Because it is a crystal

• Because the molecules expand in volume as water freezes into a crystal

• Because ice is colder than water

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NGSS.MS-PS1-1

Why does ice float on water?

• Ice has a higher density than water.

• Ice has a lower density than water.

• The hydrogen bonds in ice are shorter.

• The hydrogen bonds in ice are longer.

What property of water allows it to be such a versatile solvent that it is often called the "universal solvent?"

• Purity

• Polarity and cohesion

• High heat capacity

• Expansion upon freezing

Our paper clips were able to float in class because of:

• Adhesion

• Cohesion

• Surface Tension

• Magic

Which of the following is LEAST likely to dissolve in water?

• nonpolar fats and oils

• polar sugar molecules

• salt made of a positive sodium ion and a negative chloride ion

• all of the substances will dissolve easily in water

Water is classified as an inorganic compound because it

• does not contain carbon

• does not contain nitrogen

• contains hydrogen

• contains oxygen

Where one part of water molecules is partially negative and the other is partially positive is called

• Bonding

• Polarity

• Charged

• Neutral

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NGSS.MS-ESS2-4

What is the primary reason water has a high specific heat capacity?

• A) Hydrogen bonding between water molecules

• B) Ionic bonding within water molecules

• C) Van der Waals forces between water molecules

• D) Covalent bonding within water molecules

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4