Grade 8 Science: Slide Observation
This worksheet covers key concepts and practical skills related to preparing and observing microscopic slides, focusing on cell structures.
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Grade 8 Science: Slide Observation
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Read each question carefully and answer to the best of your ability. Refer to your knowledge of microscopy and cell observation.
1. Which part of the microscope is used to make large adjustments to the focus?
Fine adjustment knob
Coarse adjustment knob
Diaphragm
Revolving nosepiece
2. What is the purpose of adding a drop of water to a dry mount slide?
To dry the specimen
To prevent air bubbles
To immerse the specimen and improve clarity
To stain the specimen
1. The is the platform where the microscope slide is placed.
2. When moving from a lower power objective to a higher power objective, the field of view becomes .
3. A mount is used for observing living organisms in a liquid.
1. Label the indicated parts of the microscope.
A:
B:
C:
D:
2. Describe the steps you would take to prepare a wet mount slide of a cheek cell sample.
1. Always start observing a slide with the highest power objective lens.
True
False
2. The diaphragm controls the amount of light passing through the specimen.
True
False
Match the cell part to its function.
1. Cell Wall
a. Controls what enters and leaves the cell
2. Cytoplasm
b. Provides structural support to plant cells
3. Cell Membrane
c. Jelly-like substance filling the cell
4. Nucleus
d. Contains the cell's genetic material
Compare the two cells shown below.
1. Which cell is a plant cell and which is an animal cell? Justify your answer by listing two distinct differences you can observe.