BIOL-112 Lab 1 Activtiy Worksheet Microscope & Cells - The ... - Free Printable

Let's solve the problem step by step.

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Task: Label the parts of the microscope shown in the picture.

We are given a labeled diagram of a compound light microscope with 14 numbered lines pointing to different parts. Below the image is a list of 14 components, which we need to match correctly to their respective numbers on the diagram.

We will go through each number and identify the correct part based on its location and function.

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Step-by-step labeling:

1. Eyepiece – This is the lens at the top that you look into. It’s located at the very top of the microscope head.
✔ Label: 1 → eyepiece

2. Nosepiece – This is the rotating turret that holds the objective lenses. It's located just below the eyepiece and above the stage.
✔ Label: 2 → nosepiece

3. Objective lens – These are the lenses mounted on the nosepiece (usually 4 of them). They magnify the specimen.
✔ Label: 3 → objective lens

4. Stage – This is the flat platform where the slide is placed for viewing. It has clips to hold the slide in place.
✔ Label: 4 → stage

5. Diaphragm – Located beneath the stage, this controls the amount of light passing through the specimen. Often adjustable via a lever or disk.
✔ Label: 5 → diaphragm

6. Light source – Found underneath the stage, it provides illumination for the specimen. In modern microscopes, it's usually an LED or bulb.
✔ Label: 6 → light source

7. Base – The bottom part of the microscope that supports the entire structure and houses the light source.
✔ Label: 7 → base

8. Power switch – Usually located on the base or side of the microscope. It turns the light source on and off.
✔ Label: 8 → power switch

9. Light intensity knob – Controls the brightness of the light source. Typically found near the base or side.
✔ Label: 9 → light intensity knob

10. Stage adjustment knobs – These are the knobs used to move the stage horizontally (X and Y directions) to position the slide.
✔ Label: 10 → stage adjustment knobs

11. Fine focus adjustment knob – Smaller knob used for precise focusing after coarse adjustment. Usually smaller than the coarse knob.
✔ Label: 11 → fine focus adjustment knob

12. Coarse focus adjustment knob – Larger knob used for initial focusing by moving the stage up and down quickly.
✔ Label: 12 → coarse focus adjustment knob

13. Arm – The curved support that connects the head to the base. It's the part you hold when carrying the microscope.
✔ Label: 13 → arm

14. Rotating head – Also known as the binocular head, this allows the user to rotate the eyepieces to adjust viewing angle (e.g., for comfortable viewing).
✔ Label: 14 → rotating head

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✔ Final Answer:

| Number | Part |
|--------|------|
| 1 | Eyepiece |
| 2 | Nosepiece |
| 3 | Objective lens |
| 4 | Stage |
| 5 | Diaphragm |
| 6 | Light source |
| 7 | Base |
| 8 | Power switch |
| 9 | Light intensity knob |
| 10 | Stage adjustment knobs |
| 11 | Fine focus adjustment knob |
| 12 | Coarse focus adjustment knob |
| 13 | Arm |
| 14 | Rotating head |

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🔍 Explanation of Key Functions:

- Eyepiece & Objective Lenses: Together they provide magnification. Total magnification = eyepiece magnification × objective magnification.
- Focus Knobs: Coarse for quick focusing, fine for sharp detail.
- Stage & Stage Adjustment Knobs: Allow precise positioning of the slide.
- Diaphragm: Adjusts light intensity and contrast.
- Light Source & Intensity Knob: Provides and regulates illumination.
- Arm & Base: Structural support; arm helps carry the scope safely.

This labeling exercise helps students understand the anatomy of a compound microscope, essential for proper use and care in biology labs.

✔ All labels have been correctly matched.