The Microscope and Cells Flashcards
what is a simple microscope?
a microscope w/ a single set of lenses
a simple microscope provides?
limited magnification
what is a compound microscope?
a light microscope that contains several lenses
compound microscopes provide?
distortion free images
what is a bright field microscope?
a scope in which light travel unobstructed from the light source up through the lenses and specimen
what is resolution?
the minimum distance between two objects that allows them to form separate images
what is contrast?
how well an object stands out from its background
Who revealed the world of bacteria and protoza?
Antony van Leeuwenhoek
the magnifying power is obtained by?
multiplying the ocular times the objective power
parfocal means?
the combination of lenses will be nearly in focus
When a letter is viewed through the microscope it appears to be?
upside down
an increase in the objective power =
decrease in depth of field, decrease in light
decreased light -> increased depth of field
the universal system of measurement is the
metric system
h-bonds are
weak attractions between positive and negative parts of molecules
what is the chemical formula for table salt
NaCl
What kind of bonds hold salt atoms together?
ionic bonds
acid precipitation is a result of
air pollution
acid deposition means
any process that causes acid molecules in solution to fall from the atmosphere
how many lakes in New York no longer support fish?
200
what is a natural buffer?
limestone
acid rain has a pH of
5.0 or below
normal rainfall has a pH of
5.6
