Sort these into infectious and non-infectious: typhoid, high blood pressure, malaria, cancer, a…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Sort these into infectious and non-infectious: typhoid, high blood pressure, malaria, cancer, a common cold, a broken bone. Say which one is not really a disease.
Need a reminder? The key ideaShow
Most diseases have an immediate cause, usually a microbe, and contributory causes such as poor nutrition, unclean surroundings, crowded homes, harmful habits and inherited traits. Infectious diseases are caused by microbes and can spread; non-infectious diseases such as cancer and high blood pressure have internal causes.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Infectious. Typhoid, malaria and the common cold are caused by microbes that spread.
Step 2. Non-infectious. High blood pressure and cancer have internal causes and do not spread.
Step 3. The broken bone. It is an injury, so it is not really a disease. No microbe causes it, and it cannot spread.
Answer: infectious: typhoid, malaria, the cold. Non-infectious: high blood pressure, cancer, and the broken bone, which is an injury.
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