5 Written questions
5 Matching questions
- How does waters specific heat compare to other solvents specific heat? What properties does it have that allows this? What affect does this have on the climate?
- What are functional groups? Names?
- Why is water in the solid phase less dense? How does this support life?
- What are primary producers?
- What are the differences between a hydrophilic and hydrophobic substance?
- a Hydrophilic - attracted to water; polar or ionic; has charge
Hydrophobic - repels water; nonpolar; no charge
- b Waters specific heat is much higher that that of other solvents; this is because of hydrogen bonding; this keeps temperatures of places near/on bodies of water consistent
- c Small organic molecules with great effects:
Hydroxyl, Carbonyl, Carboxyl, Amino, Sulfhydryl, Phosphate, and Methyl
- d Hydrogen bonds keep the molecules spread out, so they don't pack together, making them less dense.
The floating ice insulates the body of water underneath it; if ice sank, then all the bodies of water would freeze solid, making life unlivable.
- e Fix C from atmospheric CO₂ (ex: Plants w/ photosynthesis)
5 Multiple choice questions
- Solvent: Substance doing the dissolving (water)
Solute: Substance being dissolved (sugar or salt)
Solution: homogenous mixture (product of solvent & solute)
- Hydrogen bonds are the bonds between two polar molecules - one with a partial positive charge and one with a partial negative charge; water is perfect for this because it has the partial negative of Oxygen and the partial positive of Hydrogen.
- Resistance to change in temperature
- Buffers are molecules that resist change in pH; they either release H⁺ to lower the pH or take up H⁺ to raise the pH
5 True/False questions
Know functional group NAMES, MOLECULAR FORMULAS, and STRUCTURES! → Hydroxyl, Carbonyl, Carboxyl, Amino, Sulfhydryl, Phosphate, and Methyl
Do the functional groups have an impact on life? Give an example. → Yes. Ex: tiny tag from a functional group determines whether we are males or females
Does form impact function? → YES!
What is heat of vaporization? How does it relate to evaporative cooling? What affect does it have on living organisms? → Heat required to convert 1g of liquid into a gaseous state (high); Evaporative cooling is the warmest molecules of a liquid leave as a gas; allows us to sweat, or release heat so we don't die
Draw functional group structure and give molecular formula for: Hydroxyl.
Example? → Hydroxyl (polar, form hydrogen bonds, polar solvents)
−OH (may be written HO-)
Ex: Alcohols, such as Ethanol