Viruses and Bacteria: Grade 7 Science
Explore the characteristics, structures, and impact of viruses and bacteria on living organisms with this comprehensive science worksheet for Grade 7.
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Viruses and Bacteria: Grade 7 Science
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Read each question carefully and answer to the best of your ability. Use the provided diagrams to help you answer some questions.
1. Which of the following is true about viruses?
They are living cells.
They can reproduce on their own without a host.
They require a host cell to reproduce.
They are always beneficial to humans.
2. Which of the following structures is found in a typical bacterial cell but NOT in a virus?
Genetic material (DNA or RNA)
Capsid
Cell wall
Protein coat
3. Viruses are much than bacteria.
4. Bacteria are organisms, meaning their cells lack a nucleus.
5. The outer protein shell of a virus is called a .
6. All bacteria are harmful to humans.
True
False
7. Antibiotics are effective against both bacterial and viral infections.
True
False
8. Look at the diagram of the virus. Describe two key features of its structure.
9. Based on the diagram of the bacterial cell, explain one way a bacterium is different from an animal cell.
Match the term on the left with its description on the right.
10. Pathogen
a. Single-celled organism without a nucleus
11. Vaccine
b. A disease-causing agent
12. Prokaryote
c. Substance that stimulates immunity against a disease
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