6. Using figure 1.11 create your own diagram of the levels of organization illustrated.
7. When did life on earth begin?
8. Why are there evolutionary conserved characteristics?
9. What are the 7 characteristics that are shared by living things? Describe each. Is there
anything else you would add to the list?
Chapter 2: After reading pgs 18-30:
Define the following terms:
Atomic mass, Atomic number, Isotope, Ion, Valence electron, Molecule, Compound, Ionic bond,
Covalent bond, Catalyst, Electronegativity, polar molecule, nonpolar molecule, hydrogen bond,
specific heat, cohesion, adhesion, capillary action, pH, buffer
Answer the following questions:
1. Draw and label the parts of an atom.
2. Explain how energy is stored and changed in an atom.
3. Describe what happens in both oxidation and reduction reactions in terms of energy and
electrons.
4. What is the octet rule and why is it important?
5. Why do atoms bond?
6. What holds ionic bonds together?
7. Why are covalent bonds formed and what makes covalent molecules stable?
8. What determines the strength of a covalent bond?
9. Explain what a chemical reaction is using the terms “ reactants” and “products”
10. How do the following impact chemical reactions: temperature, molecular concentration, and
catalysts.
11. Draw and label the parts of a water molecule showing where the electrons are.
12. Make your own table like 2.3 but explain each property in your own words and give your own
example of how it is beneficial to life.
13. Why does water have a high specific heat and why is that important?
14. How does water act as a solvent?
15. How does water organize nonpolar molecules?
16. Write the equation for the ionization of water.
17. Explain the logarithmic nature of the pH scale (and the ions involved).
18. Contrast acids and bases.
1. Explain figures 2.16 and 2.17.
2. Why is the reaction of CO
2
and H
2
O important to life?