Download lesson 1.3

Vocabulary
Lesson 1.3
Microscopic Organisms on
Earth
Compound Light Microscope
Compound Light Microscope
A microscope that
uses two or more
lenses and a light
source to magnify
objects
Objective Lens
Objective Lens
The lens on the
bottom of a
microscope’s body
tube
Ocular Lens
Ocular Lens
The lens at the top of
the microscope’s
body tube, nearest
the observer’s eye
Electron Microscope
Electron Microscope
A powerful
microscope that uses
beams of electrons,
rather than a light
source, to magnify
samples being
observed
Prokaryotes
Prokaryotes
An organism that has
a simple cell structure
without a nucleus in
each cell
Eukaryotes
Eukaryotes
An organism with a
nucleus in each cell
Cyanobacteria
Cyanobacteria
Prokaryotic producers
that produced oxygen
as a waste gas that
made Earth
inhabitable for other
living things
Protist
Protist
A single-celled,
eukaryotic organism
that cannot be clearly
classified as animal or
plant
Diatoms
Diatom
A very small
photosynthetic protist that
lives in either salt water
or fresh water
Dinoflagellate
Dinoflagellate
A protist that has
characteristics of
both plants and
animals
Protozoan
Protozoan
A protist that has no
cell walls and can find
and eat food.
Flagella
Flagella
Long, hair like
structures that whip
and lash to help
flagellates swim
Parasites
Parasites
An organism that
feeds off and harms
other organisms
Cilia
Cilia
Small, hair like
projections extending
from the outsides of
some protist’s cells
used for movement
and for capturing food
Food Vacuole
Food Vacuole
A structure inside
certain cells where
food is stored
Pseudopods
Pseudopods
A cell extension used
by protist to move
about and capture
food; means “false
foot”
Amoeba
Amoeba
A protist, found in
fresh water, salt
water, and soil, that
uses pseudopods to
move and take in food
The End
Created By: Paige Rogers,
Carlie McMahon, & Annamarie
Rodriguez