AP Biology Unit 1 Test Questions
With Correct Answers
Water - answer✔✔-polar molecule
-polar colvalent bonds
-oxygen end is partial negative and the hydrogens have a partially positive end
-cohesive
polar covalent bonds - answer✔✔-opposite ends of the molecule have opposite charges
cohesion - answer✔✔-H bonding between H2O creates it (sticky)
-allows for the movement of water against gravity
-high surface tension
-water moves up a tree by transpiration (helped by ____)
adhesion - answer✔✔-H2O molecules form H bonds with other substances
~capillary action
~meniscus
~water climbs up fiber
solvent - answer✔✔-water is the universal one
-polar water molecules will surround the (+) and (-) ions causing the ions to separate and
dissolve
-dissolve solutes and create aqueous solutions
hydrophilic - answer✔✔-some molecules have an affinity for water
-polar and ionic molecules
-ex: cotton, cellulose, paper
hydrophobic - answer✔✔-some substances do not have an affinity for water
floats - answer✔✔-less dense when it is solid, water ______
-forms crystal lattice structure
-important because oceans and lakes do not freeze solid
~insulates water below
~seasonal turnover of lakes
specific heat - answer✔✔-the amount of heat that must be absorbed or lost for 1g to change its
temperature by 1C
-water had high _____ due to H bonding
-resists change in temp
-moderates temp on earth
evaporative cooling - answer✔✔-organisms use to regulate their temperature
-ex: sweating
-water evaporates through a surface, cooling occurs
acidic - answer✔✔If [H+]>[-OH]
basic - answer✔✔If [-OH]>[H+]
pH scale - answer✔✔-how acidic or basic a solution is
-pure water, only 1 molecule in every 554 million is dissociated
-most biological fluids have 6-8
-each unit represents a 10-fold difference in H+ and -OH concentrations
neutral - answer✔✔-If concentration of 2 ions is equal
carbon - answer✔✔-all life mostly based on this element
-important due to its electron configuration
~able to make 4 stable covalent bonds (tetra valence)
~very versatile
-tetravalence allows them to be strung together in chains
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Thebright. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R215,26. You're not tied to anything after your purchase.
