Chapter & 3 Review Sheet – Part II
Part I. Vocabulary. Use the terms below to complete each sentence.
Cohesion
Polar
Surface tension
Adhesion
Nonpolar
Capillarity
Hydrogen
1.
The cooking oil did not dissolve in the water because water is a _____________
compound, meaning it has charged ends, while the cooking oil is
_______________, meaning is does not have charged ends.
2.
Water molecules tend to stick together, a property known as
_______________________.
3. Water molecules tend to stick to other things, a property known as
___________________.
4. Adhesion and cohesion work together to allow water to flow upwards against
gravity through tiny tubes, a property known as _________________________.
5. _____________________ bonds are caused when a H+ in one molecule is
attracted to a negatively charged atom in another molecule.
6. The “thin skin” on the surface of water caused by water molecules sticking
together. __________________ _______________________
Part II. Organic molecules. Identify which organic molecules are being described below.
Carbohydrates
Lipids
Proteins
Nucleic acids
7. DNA and RNA are examples of _________________.
8. Sugars and starches are examples of _____________________.
9. Muscle, skin, and enzymes are examples of ______________.
10. ______________ are made of nucleotides.
11. _________________ build living tissue and help in chemical reactions.
12. ________________ are a source of long-term stored energy.
13. Meat, eggs, soy, and beans contain ___________________.
14. Fruits, vegetables, cereal, and pasta contain ______________________.
15. _________________________ and _______________ both contain the elements
carbon, hydrogen, and oxygen.
16. ______________________ are made of amino acids.
17. Examples of these molecules include fats, oils, and waxes.
18. _________________________ are important because they contain your genes.
19. ____________________________ are important because they provide you with a
quick source of energy.
20. ___________________ can be found in dairy products, meat, and fried foods.
Part III. Short answer.
21. What evidence did you see in the water lab that water is a catalyst for a chemical
reaction? (Think about what happened with the dry cream of tartar and baking
soda vs. when you added water.)
22. Was the paper clip floating on top of the water? If not, what was holding it up?
Part IV. Diagrams.
Look on the following page. Label the following: monosaccharide, disaccharide,
polysaccharide, amino acid, saturated fat, unsaturated fat, polyunsaturated fat.