Compound Microscope Parts Quiz for Grade 7 Science (with Answers)

📚 Quick Study Guide

• 🔬 Microscope Basics: A compound microscope uses multiple lenses to magnify small objects.
• 🔭 Magnification: Total magnification is calculated by multiplying the magnification of the objective lens and the eyepiece lens ($Total\;Magnification = Objective\;Lens \times Eyepiece\;Lens$).
• 💡 Eyepiece (Ocular Lens): The lens you look through, usually magnifies 10x.
• 🎯 Objective Lenses: These lenses are near the specimen and usually range from 4x to 100x.
• ✨ Stage: The platform where you place the slide.
• 🔆 Light Source: Provides illumination to view the specimen.
• ⚙️ Focus Knobs: Coarse and fine focus knobs adjust the sharpness of the image.
• 🛡️ Arm & Base: Used to carry and support the microscope.

🧪 Practice Quiz

1. What is the function of the objective lens in a compound microscope?
   1. A. To magnify the image of the specimen.
   2. B. To control the amount of light passing through the specimen.
   3. C. To hold the slide in place.
   4. D. To adjust the focus of the image.
2. Which part of the microscope do you look through to view the specimen?
   1. A. Objective lens
   2. B. Stage
   3. C. Eyepiece lens
   4. D. Light source
3. What is the purpose of the stage on a compound microscope?
   1. A. To magnify the image.
   2. B. To hold the specimen slide.
   3. C. To control the light intensity.
   4. D. To adjust the focus.
4. If the eyepiece lens magnifies 10x and the objective lens magnifies 40x, what is the total magnification?
   1. A. 4x
   2. B. 10x
   3. C. 40x
   4. D. 400x
5. Which part of the microscope is used to adjust the amount of light passing through the specimen?
   1. A. Objective lens
   2. B. Diaphragm
   3. C. Eyepiece lens
   4. D. Focus knob
6. What is the function of the coarse and fine focus knobs?
   1. A. To adjust the magnification.
   2. B. To control the light intensity.
   3. C. To sharpen the image.
   4. D. To hold the specimen in place.
7. Which parts of the microscope are used for carrying it safely?
   1. A. Stage and objective lens
   2. B. Eyepiece and focus knobs
   3. C. Arm and base
   4. D. Light source and diaphragm