Lesson 1 ·Class 9 · Diseases : Cause and Control · Sort Lab
Classifying Diseases by Occurrence
Sporadic, endemic, epidemic, pandemic.
Sort each example by its pattern of occurrence.
Sorted 0/7
All items sorted — check each bin.
Free play — sort every item into the bin it belongs in; each correct drop tells you why. Switch to when you're ready to test yourself.
Endemic is about being ALWAYS there; epidemic is about a SUDDEN RISE; pandemic is an epidemic that crossed borders.
What this lesson covers
Challenges to clear
- Fill the Epidemic bin correctly.
- Sort every example.
- Fill the Endemic box — the diseases that never leave a region.
The task
Sort each example by its pattern of occurrence.
What this lesson covers
- Sporadic — Occasional, scattered: A few unconnected cases of tetanus in a year (Isolated cases with no pattern of spread between them.)
- Endemic — Always present in an area: Malaria constantly present in a coastal district (It never disappears there; conditions always favour the mosquito.); Goitre common in a particular hill region, year after year (Caused by low iodine in the local soil and water.)
- Epidemic — Sudden spread in a region: Cholera breaking out across a town after a flood (A sudden rise in cases well above the usual level, in one area.); Dengue cases surging across a city after the monsoon (Rapid increase confined to one region.)
- Pandemic — Across countries: COVID-19 spreading through many countries at once (An epidemic that has crossed continents.); The influenza outbreak of 1918 that circled the world (The classic example, and the deadliest on record.)
Hint
Endemic is about being ALWAYS there; epidemic is about a SUDDEN RISE; pandemic is an epidemic that crossed borders.