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Lesson Bacteria: What and How? - Study

Instruction

Read the information below carefully several times and try to remember the key points.

Click on a chapter to view the information.

Tip: read the information out loud (but in such a way that you do not disturb others).

1. Very Small

Bacteria are very, very small organisms (living things) measuring 0.00001 cm (1 ten-thousandth of a centimeter). They consist of only one cell and you can only see them with a microscope.


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2. Diseases

Bacteria can cause all kinds of diseases. Also contagious diseases such as tuberculosis, diphtheria, the plague and cholera.


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3. Protect

You can protect yourself against bacteria by washing thoroughly (especially your hands) with soap and disinfectant gel, sunlight, vaccinations and medicines that kill the bacteria (disinfect).

Fortunately, most bacteria are good bacteria. We even need them to stay healthy.


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4. Multiplication

Bacteria multiply very quickly. For example, by hot air on stagnant water.

From a single bacterium, 70 million new bacteria can develop within one day.


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5. 30 second rule

If you wash your hands gently and thoroughly for 30 seconds with soap and warm water, you can get rid of many disease-causing bacteria from your hands.

Until recently it was the 20 second rule. But 20 seconds turns out to be insufficiently effective in practice.

Sing a song in your head that lasts 30 seconds. That helps to do it long enough.


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Key points

Key points to remember are:

  • Bacteria are invisibly small
  • Bacteria are organisms
  • Bacteria can make you sick
  • Bacteria grow very quickly
  • Bacteria don't like soap

Next step

Once you have gone through the above information a few times, start doing the exercises that go with it.

Practice

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Primairy School Wisdoms

These are the fundamental life lessons and pieces of advice that often get instilled in us during those formative years. They might seem simple, but they lay the groundwork for how we navigate the world.

Here are 7 key wisdoms often learned (or at least introduced) in primary school:

1 - Be kind to everyone. This extends beyond just treating others well; it emphasizes inclusivity, compassion, and understanding towards all individuals, regardless of their differences.

2 - It's important to ask for help when you need it.This encourages seeking support, recognizing limitations, and understanding that it's a sign of strength, not weakness.

3 - Try your best.This emphasizes the importance of effort and personal growth, regardless of the outcome. It encourages a positive attitude towards challenges.

4 - Be yourself.This fosters self-acceptance, individuality, and the understanding that everyone is unique and valuable in their own way. It discourages trying to fit in at the expense of one's own identity.

5 - Honesty is the best policy. his instills the value of truthfulness and integrity. It teaches that while being honest might be difficult sometimes, it builds trust in the long run.

6 - Everyone makes mistakes; it's okay to try again. This fosters resilience, encourages learning from errors, and reduces the fear of failure. It highlights the importance of perseverance.

7 - Listen carefully when others are speaking.This develops active listening skills, shows respect, and aids in understanding. It's crucial for effective communication.

These wisdoms are often conveyed through stories, classroom rules, teacher guidance, and interactions with peers. They form a moral and social compass that helps children navigate their early years and beyond. While we might refine or expand on these ideas as we grow, their core messages often stick with us throughout life.

Fun Animal Facts

Here are 7 fun animal facts perfect for primary school children:

1 - chameleon's tongue can be as long as its body: They can shoot it out very quickly to catch insects.

2 - Sea otters hold hands while they sleep: This stops them from drifting apart in the ocean. How cute!

3 - Elephants are the only land animals that can't jump: Their legs are too stiff and strong.

4 - Polar bear fur isn't white: Each hair is actually clear and hollow, reflecting light to make them appear white. Their skin underneath is black to absorb the sun's warmth.

5 - A hummingbird can fly backward: They are the only birds that can fly in all directions, even upside down!

6 - A blue whale's tongue can weigh as much as an elephant: They are the largest animals on Earth!

7 - The fingerprints of a koala are so close to humans' that they could confuse crime scene investigators!

These are just a few of the many amazing facts about animals! The animal kingdom is full of surprises.

Country Facts

Let's explore some fun facts about 7 different countries that you might find interesting!

1 - Egypt: This ancient country has amazing pyramids and the long Nile River, where crocodiles and hippos live.

2 - China: The Great Wall of China is so long that it can be seen from space (though it's debated how easily)! They also invented paper and the compass.

3 - New Zealand: It's famous for its unique bird called the kiwi (which is also the name of a fuzzy fruit!) and its beautiful green landscapes.

4 - Russia: It's the largest country in the world by land area and is home to the colorful St. Basil's Cathedral in Moscow.

5 - South Africa: It has the 'Rainbow Nation' nickname because of its many different cultures, and you can see penguins on some of its beaches!

6 - Madagascar: This island country is home to lemurs, funny-looking primates that are found nowhere else in the world.

7 - United States: It has many different landscapes, from sunny beaches in California to snowy mountains in Colorado, and it's the birthplace of Hollywood movies.

We hope these snippets give you a fun glimpse into different countries around the world! Each one has its own unique and fascinating things to discover.