Unit 2 Test Flashcards
Covalent Bonds
bonds formed between atoms by the sharing of elements - strong bond
Hydrogen Bonds
attraction between slightly positive hydration atom and slightly negative atom - weak bond
Polarity
the distribution of electrical charge over the atoms joined by the bond
Electronegativity
a chemical property that describes the tendency of an atom to attract electrons toward itself.
Hydrophilic substances
attracted to water, dissolves in water
Hydrophobic substances
repels from water (oily and greasy solutions)
Cohesion
attraction between molecules of the same substances
Adhesion
attraction between different substances
Homeostasis
A state of balance among all the body systems needed for the body to survive and function correctly
Solute
substance that dissolves in solvent
Solvent
able to dissolve other substances (water)
Solution
mixture composed of two or more substances.
Acid
a chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus red
Base
any substance that in water solution is slippery to the touch, turns litmus blue
pH
measure of how acidic/basic water is
Hydrologic Cycle
water cycle
Condensation
the process where water vapor becomes liquid
Evaporation
the process of turning from liquid into vapor
Transpiration
the process by which plants give off water vapor through openings in their leaves
Precipitation
any liquid or frozen water that forms in the atmosphere and falls back to the Earth
surface runoff
water, from rain, snowmelt, or other sources, that flows over the land surface