Chapter 4: The Microscope

Question 1

Flashcard 1:
Front: Body tube/body

Answer 1

Back: Connects the ocular (eyepiece) to the objective lenses. It is the part through which an image is viewed with the aid of an eyepiece.

Question 2

Flashcard 2:
Front: Eyepiece (ocular lens)

Answer 2

Back: Further magnifies the image projected by the objective lenses. Allows for clearer observation of the specimen in a microscope.

Question 3

Flashcard 3:
Front: Arm

Answer 3

Back: Supports the body tube and is held when carrying the microscope. It is the central support for the microscope, providing stability.

Question 4

Flashcard 4:
Front: Base/foot/stand

Answer 4

Back: Acts as a steady support for the microscope, providing stability and balance to the instrument.

Question 5

Flashcard 5:
Front: Objective lens

Answer 5

Back: Forms a magnified image of the object in the intermediate image plane. Offers different levels of magnification for observing specimens.

Question 6

Flashcard 6:
Front: Revolving nosepiece

Answer 6

Back: Contains the objective lenses and rotates to change magnifications. Allows for easy selection of different objective lenses for varying magnifications.

Question 7

Flashcard 7:
Front: Stage/stage large

Answer 7

Back: Supports the slide and allows light to pass through. Provides a platform for holding slides and allows illumination of specimens.

Question 8

Flashcard 8:
Front: Stage clips

Answer 8

Back: Holds the slide in position on the stage. Secures the slide in place for stable observation.

Question 9

Flashcard 9:
Front: Coarse adjustment knob

Answer 9

Back: Moves the tube and lenses rapidly to bring the specimen into focus. Quickly adjusts focus when using the low power objective lens.

Question 10

Flashcard 10:
Front: Fine adjustment knob

Answer 10

Back: Provides precise focus adjustment for clearer images. Allows for fine-tuning of focus, especially with higher power objective lenses.

Question 11

Flashcard 11:
Front: Light source

Answer 11

Back: Bulb supplies light onto the stage, enabling illumination of the specimen for observation.

Question 12

Flashcard 12:
Front: Iris diaphragm (condenser)

Answer 12

Back: Regulates the amount of light that passes through the specimen on the stage, controlling illumination for optimal viewing conditions.

Question 13

Flashcard 13:
Front: Mirror

Answer 13

Back: Reflects light up through the specimen on the stage. It is flat on one side and concave on the other to provide different lighting options.

Question 14

Flashcard 14:
Front: Biological specimen

Answer 14

Back: A small sample or part taken for microscopic studies to show the nature of the whole, facilitating detailed observation and analysis.

Question 15

Flashcard 15:
Front: Magnification

Answer 15

Back: The number of times an object or image is increased in size by a lens system, enhancing visibility and detail for observation.

Question 16

Flashcard 16:
Front: Calculating magnification of the microscope

Answer 16

Back: Formula: Magnification of the objective lens × Magnification of the eyepiece lens. Indicates the overall magnification level used for observation.

Question 17

Flashcard 17:
Front: Calculating magnification and size of biological specimens

Answer 17

Back: Formula: Magnification of the drawing = Size of the drawing ÷ Actual size. Helps determine the magnification factor and size of specimens observed through drawings.

Question 18

Flashcard 18:
Front: Calculating the actual size of a specimen

Answer 18

Back: Formula: Actual size = Size of image (drawing or photograph) ÷ Magnification. Allows for determining the true dimensions of a specimen based on its observed size and magnification level.

Question 19

Flashcard 19:
Front: Biological drawings

Answer 19

Back: Drawings made using sharp pencils to represent specimens accurately. Should be detailed, labeled, and free of shading or coloring for clarity in scientific illustration.

Question 20

Flashcard 20:
Front: Labeling lines in biological drawings

Answer 20

Back: Lines should be drawn in pencil, touch the part they identify, not cross each other, be on one side of the drawing, be straight with no arrows, and labels must be printed in ink for clarity and consistency.

Question 21

Flashcard 21:
Front: Low power objective lens

Answer 21

Back: Objective lens with the lowest magnification. Used for initial observation and scanning specimens at lower magnification levels.

Question 22

Flashcard 22:
Front: Medium power objective lens

Answer 22

Back: Objective lens with intermediate magnification. Offers higher magnification than the low power lens for more detailed observation of specimens.

Question 23

Flashcard 23:
Front: High power objective lens

Answer 23

Back: Objective lens with the highest magnification. Provides the greatest level of magnification for detailed examination of small structures within specimens.

Question 24

Flashcard 24:
Front: Magnification of the drawing formula

Answer 24

Back: Formula: Magnification of the drawing = Length of drawing ÷ Actual length. Used to calculate the magnification factor of a drawn specimen compared to its actual size.

Question 25

Flashcard 25:
Front: Actual leaf size

Answer 25

Back: The true size of a leaf specimen, typically measured in millimeters or another unit of length, used as a reference for calculating magnification.

Question 26

Flashcard 26:
Front: Length of drawing

Answer 26

Back: The measured length of a drawn specimen, used in conjunction with the actual size to determine the magnification factor applied to the drawing.