Chemical Bonds, Water Properties, and Enzymes

The smallest basic unit of matter is called 

• A molecule
• A cell
• An atom
• An element

Large bodies of water do not quickly fluctuate in temperature. Why?

• Water is a solvent.
• Water has a high heat capacity.
• Water acts as a buffer.
• Water is non-polar.

A pH of 7 represents a substance that is

• acidic

• neutral

• basic

What word describes when water is attracted to other substances?

• cohesion
• adhesion
• capillary action
• surface tension

Tags

NGSS.HS-ESS2-5

The substance that gets dissolved is called the solvent.
True or False?

• True.
• False.

The attraction that causes water and other liquids to form drops is called ________________. This is also water’s ability to be attracted to other water molecules.

• adhesion
• capillary action
• cohesion
• surface tension

Attractions between water molecules are called

• Covalent bonds
• Ionic bonds
• Polar bonds
• Hydrogen bonds

An ionic bond forms when atoms ___________ electrons.

• gain
• share
• increase
• transfer

Chemical bonds form when atoms

• combined nuclei
• give up neutrons
• gain protons
• share or transfer electrons

What do we call an atom that has given up or gained electrons?

• An ion
• An iron
• A different atom
• A metalloid