honors biology
Ch 2 “The Chemical Basis of Life”
Chapter Objectives
Opening Essay
Explain how lemon ants prevent the growth of plants that could compete with lemonant trees.
Elements, Atoms, and Molecules
2.1
Define matter, an element, and a trace element.
2.2
Explain how and why iodine, fluoride, and iron are added to the human diet.
2.3
Define a compound and explain how compounds in living organisms are different from compounds in
nonbiological materials.
2.4
Describe the structure of an atom.
2.4
Define the atomic number and mass number of an atom.
2.4
Define an isotope and explain what makes some isotopes radioactive.
2.5
Describe the dangers and uses of radioactive isotopes.
2.6
Explain how the electron configuration of an atom influences its chemical behavior.
2.7–2.10 Distinguish between ionic bonds, nonpolar covalent bonds, polar covalent bonds, and hydrogen bonds,
noting their relative strengths and how and where they form.
Water’s Life-Supporting Properties
2.11–2.14
Describe the special properties of water that make it vital to living systems. Explain how these
properties are related to hydrogen bonding.
2.11 Define and distinguish between cohesion and surface tension.
2.12 Define and distinguish between heat and temperature.
2.14 Define a solute, a solvent, and a solution.
2.15 Explain how acids and bases directly or indirectly affect the hydrogen ion concentration of a solution.
2.15 Explain the basis of the pH scale.
2.15 Explain how buffers function.
2.16 Describe the causes and consequences of acid precipitation and ocean acidification.
2.17 Explain why the search for extraterrestrial life centers on the search for water.
Chemical Reactions
2.18 Explain the significance of chemical reactions. Identify the reactants and products of photosynthesis.
Key Terms
acid
acid precipitation
adhesion
aqueous solution
atom
atomic mass
atomic number
base
buffer
chemical bond
chemical reaction
cohesion
compound
covalent bond
double bond
electron
electron shell
electronegativity
element
heat
hydrogen bond
ion
ionic bond
isotope
mass number
matter
molecule
neutron
nonpolar covalent
bond
nucleus (plural,
nuclei)
pH scale
polar covalent bond
polar molecule
product
proton
radioactive isotope
reactant
salt
solute
solution
solvent
surface tension
temperature
trace element
Student Media
Elements, Atoms, and Molecules
Activity: Structure of the Atomic Nucleus (2.4)
Activity: Electron Arrangement (2.6)
Activity: Build an Atom (2.6)
Activity: Ionic Bonds (2.7)
Activity: Covalent Bonds (2.8)
Water’s Life-Supporting Properties
MP3 Tutor: The Properties of Water (2.11)
Activity: Cohesion of Water (2.11)
Activity: Acids, Bases, and pH (2.15)
Process of Science: How Does Acid Precipitation
Affect Trees? (2.16)
Discovery Channel Video Clip: Early Life (2.17)
BLAST Animation: Hydrogen Bonds in Water
(2.11)
Mrs. Loyd 
[email protected]
Page 1 of 1
http://loydbiology.weebly.com
Activity: Nonpolar and Polar Molecules (2.9)
Activity: Water’s Polarity and Hydrogen Bonding
(2.10)
Process of Science: How Are Space Rocks
Analyzed for Signs of Life? (2.1)
BLAST Animation: Covalent Bonds (2.8)
3/8/2016
http://www.mybiology.com
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honors biology - Mrs. Loyd's Biology