microscopes and cell theory

Question 1

Eyepiece or ocular lens

Answer 1

This is the lens that magnifies the specimen usually by 10 (10x) This is the lens you look into.

Question 2

coarse adjustment knob

Answer 2

this knob moves the stage up or down to focus on the specimen. this is the first knob you use to focus on the specimen

Question 3

fine adjustment knob

Answer 3

use this lens to sharpen an image under low and medium power. this is the only adjustment knob needed with the high power lenses.

Question 4

revolving nosepiece

Answer 4

this is where the objective lenses are mounted. rotate the lens to select low, medium, or high power lenses

Question 5

objective lenses

Answer 5

there are three lenses that magnify the specimen: low power (4x) medium power (10x) and high power (40x). keep the lenses free of dirt and fingerprints.

Question 6

stage

Answer 6

this is where you place a slide for observation. always keep the stage dry

Question 7

stage clips

Answer 7

these are used to hold a slide in position on the stage

Question 8

diaphragm

Answer 8

this has different sized holes that let different amounts of light pass through the specimen on the stage

Question 9

Lamp

Answer 9

the lamp supplies the light that passes through the specimen on the stage. microscopes that do not have a lamp may have a mirror that collect and direct light

Question 10

Arm

Answer 10

the arm holds the tube in place and is used to hold the microscope

Question 11

base

Answer 11

the base provides a stable platform for the microscope. Always set it on a flat, dry, and uncluttered surface.`

Question 12

tube

Answer 12

the tube separates the ocular lens from the objective lens at a distance calculated for proper magnification.

Question 13

condenser lens

Answer 13

this lens is under the stage. it helps focus light onto the specimen on top of the stage

Question 14

1) cell theory

Answer 14

the cell is the basic unit of life. in other words the cell is the smallest living organism that shows characteristics of living things

Question 15

2) cell theory

Answer 15

a organism can be as simple as one cell (unicellular) like a paramecium. or it can be made of trillions of cells (multicellular) like an elephant.

Question 16

3) cell theory

Answer 16

all cells are created from existing cells through a process called cell division by which a cell divides into two new cells.