Grade 8 Cell Theory Worksheet
Explore the fundamental principles of cell theory, cell structures, and the differences between plant and animal cells with this comprehensive Grade 8 science worksheet.
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Grade 8 Cell Theory Worksheet
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Date:
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Read each question carefully and answer to the best of your ability. Show all your work when necessary.
1. Which scientist first observed 'cells' in cork tissue?
Anton van Leeuwenhoek
Robert Hooke
Matthias Schleiden
Theodor Schwann
2. Which of the following is NOT a part of the original Cell Theory?
All living things are made of cells.
Cells are the basic unit of structure and function in living things.
All cells contain a nucleus.
All cells come from pre-existing cells.
3. The invention of the was essential for the development of cell theory.
4. The gelatin-like substance that fills the cell and surrounds the organelles is called the .
5. All living organisms are composed of only one cell.
True
False
6. Plant cells have a cell wall, but animal cells do not.
True
False
7. List the three main principles of the Cell Theory.
8. Label the following diagrams of an animal cell and a plant cell. Identify at least 5 organelles in each.
Animal Cell
Plant Cell
9. Match the cell organelle with its primary function.
a. Nucleus
1. Site of photosynthesis
b. Mitochondria
2. Controls cell activities
c. Chloroplast
3. Produces energy (ATP)
d. Cell Membrane
4. Regulates what enters and leaves the cell
10. Imagine you are observing a new type of cell under a microscope. You notice it has a rigid outer layer, chloroplasts, and a large central vacuole. Is this most likely a plant cell or an animal cell? Explain your reasoning.
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