Term
| What are scientific theories? |
|
Definition
-describes an opinion or a hunch
-are untested hypotheses
-explains a natural phenomenon but is broader in scope -reflect broader agreement |
|
|
Term
|
Definition
-tentative explanation for 1 or more theories
-essential "unit" of scientific inquiry
-has to be testable
-has to be a way to collect data to support or reject hypothesis
-cannot be proven true |
|
|
Term
| What are the characteristics of living organisms? |
|
Definition
| Organization, Energy Use, Maintenance of Internal Consistency, Reproduction, Growth, and Development, and Evolution |
|
|
Term
| What is the organizational hierarchy? |
|
Definition
| Organism, Species, Genus, Family, Order, Class, Phylum, Kingdom, Domain |
|
|
Term
| How do you determine the number of electrons, protons, and neutrons in an atom? |
|
Definition
| Look at the periodic table. The atomic number is the number of protons. Atoms have an equal number of protons and electrons. The number of neutrons is the mass number. |
|
|
Term
| What is a polar molecule? Why are they important? |
|
Definition
| -A polar molecule has both a partial negative charge and a partial positive charge - It's important because it determines how molecules interact with each other - -It also influences how molecules react with different molecules |
|
|
Term
|
Definition
| - Attractions between the positive of one polar molecule and the negative of another |
|
|
Term
| How do hydrogen bonds contribute to the important properties of water? |
|
Definition
- They make water cohesive
-give water a high specific heat
-high heat of vaporization and fusion
-it is the universal solvent
- is less dense as a solid |
|
|
Term
|
Definition
| - forms part of plant cell walls - though most common organic compound in nature, humans can't digest it - makes up a lot of "fiber" |
|
|
Term
|
Definition
- also supports cell walls
- second most common polysaccharide -flexible, biodegradable, used in manufacture of surgical thread |
|
|
Term
|
Definition
-acts as storage molecules that break down into monomers when cells need energy
-Glycogen occurs in animal and fungal cells
- in humans, skeletal muscle cells and the liver store energy as glycogen |
|
|
Term
| What is the difference between fats and oils? |
|
Definition
| - Fats are usually of animal origin -Oils of plant origin -Common fat is lard, common oils are olive, sunflower, peanut -Fatty acids that make up fats are saturated - Oils are unsaturated - Fats are solids, Oils are liquids |
|
|
Term
|
Definition
| Covalent bonds are formed when two atoms share pairs of electrons |
|
|
Term
|
Definition
| are often soluble in water and form between two or more charged particles |
|
|
Term
| What is the difference between covalent and ionic bonds? |
|
Definition
| Covalent bonds are more important in the building of cellular structure than ionic bonds |
|
|
