A -Level Molecules, Transport and Health_4_2

• Water molecules bond in a crystalline form as the temperature of water drops. This creates more space between water molecules. What characteristic of water does this change describe?

• • A. 

    Specific heat

• • B. 

    Density

• • C. 

    Adhesion

• • D. 

    Surface tension

• • E. 

    Polarity

• Capillary action involves the following THREE properties of water: adhesion, ________________, and surface tension.

• • A. 

    • Density

• B. 

  • Polarity

• C. 

  • Non-polarity

• D. 

  • Cohesion

• E. 

  • Capillary action

• What is meant by the fact that water is a "polar" molecule?

• • A. 

    Water has a slightly negative charge overall.

• • B. 

    Water has no evident charge unless in sold form.

• • C. 

    Water has a very evident charge, but only in a gaseous form.

• • D. 

    Water has a slightly positive charge, but only as a liquid.

• • E. 

    None of the above.

• Which best describes how hydrogen bonds are created?  

• • • A. 

      The negative charge of oxygen binds with the positive charge of hydrogen on an adjacent molecule.

• • B. 

    The positive charge of oxygen binds with the negative charge of hydrogen on an adjacent molecule.

• • C. 

    The negative charge of oxygen binds with the positive charge of hydrogen within the SAME molecule.

• Fill in the blanks with the most appropriate answer: "Oil is _______________ than water as well as ________________, with evidence being that oil sits on top of water as well as seperates from water."

• • A. 

    Cooler; polar

• • B. 

    Non-polar, less dense

• • C. 

    Less dense; non-polar

• • D. 

    Cohesive; polar

• • E. 

    Denser; polar

On a large scale, the Earth is 75% water. What property of water provides the insulation and warmth of the Earth's surface?

• A. Specific heat

• B. Surface tension

• C. Cohesion

• D. Adhesion

• E. Both A and D

The amount of energy required to raise the temperature 1ºC for every kilogram is called____?

• Thermal Energy

• Specific Heat

• Temperature

• Kinetic Energy

• Shaving cream, food coloring, and postcards make for a good time! Food coloring is added to the shaving cream and applied to a postcard. Which property of water (water is the majority of food coloring + die) is directly responsible for the colorful design on the notecard? 

• A. 

  • Cohesion only

• • B. 

    Capillary action

• • C. 

    Surface tension

• D. 

  • Adhesion only

• E. 

  • Both B and C

• In relation to the ice cap, which property of water is this polar bear relying on? 

• • A. 

    • Cohesion

• B. 

  • Adhesion

• • C. 

    Specific heat

• • D. 

    Polarity

• E. 

  • Density

• Olympic event: Water on a Penny Which property of water is directly responsible for maintaining the water bubble forming on the penny?

• • A. 

    • Adhesion

• • B. 

    Cohesion

• • C. 

    Polarity

• • D. 

    Specific binding

• • E. 

    Density