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Germs & preventing illness

Grade 4 · Health & Wellness · Free lesson

Hi there! I am Studyfin, your learning buddy. Today, we will explore how to stay super healthy and stop tiny germs!

Germs are tiny living things. They are too small to see without a microscope. Some germs can make us sick when they get inside our bodies.

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Germs travel in different ways. They fly through the air when we cough or sneeze. They also live on dirty hands, doorknobs, and toys.

SNEEZEGerms spreading through the air

We can stop germs by washing our hands with soap and water. Scrubbing for twenty seconds washes the germs down the drain!

SOAPSoap bubbles trapping and removing germs

Immunization is another key shield. Vaccines are like a practice run for your body. They teach your immune system how to fight off real germs safely.

✏️ Worked example

Let us analyze how germs can spread at school. Imagine your friend Leo has a cold. He sneezes into his bare hand. Then, he opens the classroom door. Next, you open the same door and eat an apple. Explain how the germs traveled and how you could prevent getting sick.

  1. Identify the source: Leo has cold germs in his nose and mouth.
  2. Trace the first move: Leo sneezes. The germs travel from his nose onto his bare hand.
  3. Trace the second move: Leo touches the doorknob. The germs transfer from his hand to the metal surface.
  4. Trace the third move: You touch the doorknob. The germs hitch a ride on your hand.
  5. Trace the entry: You eat your apple with unwashed hands. The germs enter your mouth.
  6. Find the prevention steps: Leo could sneeze into his elbow. You could wash your hands before eating.
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