Unit 1: Introduction to Biotechnology & Lab Safety Flashcards
How many grams is a deka gram?
10
How many grams is a hectogram?
100 (10^2)
How many grams is a kilogram?
1,000 (10^3)
How many grams is a megagram?
1,000,000 (10^6)
How many grams is a gigagram?
1,000,000,000 (10^9)
How many grams is a decigram?
0.1 (10^-1)
How many grams is a centigram?
0.01 (10^-2)
How many grams is a milligram?
0.001 (10^-3)
How many grams is a microgram?
0.000001 (10^-6)
How many grams is a nanogram?
0.000000001 (10^-9)
What is the ocular lens of a microscope?
also known as eyepiece
where you put your eye
magnifies the image produced by the objective lens so that the human eye can see it
What is the arm of a microscope?
piece that connects the base of the microscope to the body tube
What is the rack stop of a microscope?
physically blocks the user from moving the stage too close to the objective lens and damaging it
What are the stage clips of a microscope?
clips that hold the slide being observed in place
What is the course focus of a microscope?
big dial
moves the stage up and down to bring what is being studied to near focus quickly
What is the fine focus of a microscope?
smaller dial
fine tunes the focus achieved by the course focus, sharpens the image
What is the nose piece of a microscope?
holds the objective lenses and can be rotated to change in between the lenses
What is the objective lens of a microscope?
directly observes the object being studied and magnifies it for the user
On lab microscopes, there is a 4x, 10x, 40x, and 100x
What is the stage of a microscope?
where the slide being studied is placed to be magnified and observed
What is the condenser of a microscope?
focuses light on the specimen to sharpen the image
What is the illuminator of a microscope?
produces high intensity light to be shined upwards through the slide
What is the purpose of a stain?
makes a transparent sample easier to observe by making it visually more distinct from its background
What is a dissecting microscope?
used to view large 3D objects
up to 40x magnification
What is a compound light microscope
used for very small thin things
magnification up to 1000x
What is an electron microscope?
uses scanning or transmission electron microscopy to view the interior of a cell
shows very fine detail
What two scientists were instrumental in the invention and development of microscopes?
robert hooke - made first microscope
anton van leeuwenhoek - created field of microbiology