Grade 8 Science: Understanding Diseases
This worksheet covers key concepts about diseases, including types, causes, transmission, and prevention, suitable for Grade 8 science students.
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Grade 8 Science: Understanding Diseases
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Date:
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Read each question carefully and answer to the best of your ability. Good luck!
1. Which of the following is NOT an infectious disease?
Flu
Common Cold
Diabetes
Measles
2. How are viruses different from bacteria?
Viruses are living organisms, bacteria are not.
Bacteria are larger than viruses and can reproduce independently.
Viruses can be treated with antibiotics, bacteria cannot.
Bacteria are always harmful, viruses are always beneficial.
3. Diseases that can be spread from one person to another are called diseases.
4. A weakened form of a pathogen used to create immunity is called a .
5. Handwashing is an effective way to prevent the spread of many infectious diseases.
True
False
6. All bacteria are harmful to humans.
True
False
7. Briefly explain the difference between a communicable and a non-communicable disease.
8. Observe the images below. Identify which one represents a bacterium and which represents a virus. Explain your reasoning.
Use the words below to complete the sentences.
9. Microorganisms that cause diseases are known as .
10. The body's defense against disease is called the .
11. Bacterial infections can often be treated with .
12. Receiving a helps your body develop immunity to a specific disease.
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