Water and Solutions Test Review

What elements make up a water molecule?

• 2 hydrogen and 1 oxygen

• 2 oxygen and 1 hydrogen

• 2 carbon and 1 oxygen

• 2 helium and 1 oxygen

Tags

NGSS.MS-PS1-1

Why does ice float on liquid water?

• it's more polar

• it's less polar

• it's less dense

• it's more dense

Which property of water allows bugs to walk on the surface of water, as well as allowing paper clips to float on water?

• capillary action

• density

• surface tension

• pH

Why do water molecules stick together?

• negative sides of both hydrogen and oxygen repel one another

• positive sides of both hydrogen and oxygen repel one another

• negative sides of hydrogen attracts the positive sides of oxygen

• negative sides of oxygen attracts the positive sides of hydrogen

What is adhesion?

• ability to cling to other surfaces

• ability to cling to identical molecules

• sum of the forces between atoms

• difference of the forces between atoms

What is the term for this definition: attraction of water to other water molecules.

• adhesion

• cohesion

• density

• solubility

What is the term for this definition: Attraction between a highly negative side of a molecule and the positive hydrogen side of another molecule?

• covalent bond

• ionic bond

• hydrogen bond

• pH

Which will LEAST likely dissolve in water and why?

• salt because its positive and negative ions are attracted to polar water

• bleach because its positive and negative ions are attracted to polar water

• sugar because its polar molecule is attracted to polar water

• oil because its non-polar molecules have no attraction to polar water

What do you call the substance that is dissolved in a solution? For example, the sugar dissolved in your sweet tea.

• solute

• solvent

• solution

• dilution

Compounds that conduct electricity when dissolved are called what?

• Colloids

• Suspensions

• Electrolytes

• Non-Electrolytes