"Tiny World and Us" Tiny World PPT Courseware 2

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"Tiny World and Us" Tiny World PPT Courseware 2

Before the invention of the microscope, people could only use the five sense organs of eyes, ears, nose, tongue, and hands to detect time. At that time, the smallest animals that people could observe were ants and other insects.

The invention of magnifying glasses and microscopes allowed us to see microorganisms and cells.

The road for humans to conquer germs:

In the past, infectious diseases such as typhoid fever, plague, and cholera were raging everywhere, and humans had no choice but to wait and see. With the invention and continuous improvement of microscopes, scientists have successively discovered many bacteria and viruses that harm humans, and have since begun to fight against them.

Give an example of the impact of microorganisms on our lives.

The garbage disposal and sewage treatment around us also rely on microorganisms. Without microorganisms, the earth will become a world of garbage.

choose

1. The nose can feel objects ( ).

A. Color B. Shape C. Transparency D. Smell

2. The first person to point out the relationship between microorganisms and human health was ( ).

A. Pasteur B. Archimedes C. Mendeleev D. Marie Curie

judge

1. Microorganisms are not all beneficial and harmless to humans. ( )

2. The yeast we use when steaming steamed buns is a kind of microorganism. ( )

3. Infectious diseases such as typhoid fever, plague, and cholera are all caused by harmful microorganisms. ( ).

4. Before the invention of magnifying glasses and microscopes, people could only rely on their own sense organs to perceive the world. ( )

5. The viruses that make us sick are microorganisms, so all microorganisms are harmful to us humans. ( )

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"Tiny World and Us" Tiny World PPT download:

"Tiny World and Us" Tiny World PPT Download Part One: Review and Summary How have human observation tools developed from ancient times to the present? How do people expand their observation horizons? ... ... ... Tiny World and Us PPT, Part 2...

"Tiny World and Us" Tiny World PPT:

"Tiny World and Us" Tiny World PPT Part One Content: Review and Summary Review the learning content of this unit, think about how human observation tools have developed from ancient times to the present, and how people's observation horizons have expanded. Let's talk about two relationship between them. ..

"Tiny World and Us" Tiny World PPT Courseware 4:

"Tiny World and Us" Tiny World PPT Courseware 4 Review and Summary Review the learning content of this unit and think about how human observation tools have developed from ancient times to the present. People can only use the five sense organs of eyes, ears, nose, tongue, and hands to explore the world. At that time,...

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Update Time: 2024-10-17

This template belongs to science courseware Science Edition for Sixth Grade Science Volume 2 industry PPT template

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