"The Sink and Float of Materials in Water" Materials around us PPT

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"The Sink and Float of Materials in Water" Materials around us PPT

Part One: Sinking and Floating Experiment

If you put common materials such as wood, paper, metal, and plastic into water, which of them will float and which will sink?

Collect small, solid objects made of wood, metal, or plastic. Divide them into categories and number them according to category so that you can observe and record them accurately.

First predict the sinking and floating of these objects in water, record them in the table, and then do the experiment.

think:

How are the materials put into the water?

Place the object gently into the center of the water and then let go.

How to judge the sinking and sinking of materials?

If the object touches the bottom of the water tank downward, it means that the object sinks in the water, which is represented by " "; if the object cannot touch the bottom of the water tank, it means that the object floats in the water, which is represented by " ".

Are the results of the experiment what we predicted?

What objects float in water? What objects sink in water?

Does the sinking and floating of an object in water depend on the materials used to make it?

Objects made of metal materials sink in water;

Items made of plastic and wood-like materials generally float in water;

The paper may float at first and then sink to the bottom after it is fully soaked.

How an object sinks and floats in water depends on the materials used to make it.

PPT on the sinking and floating of materials in water, part 2: understanding wood

Wood has been a very important natural material since ancient times. People directly process trees into lumber, which is widely used in all aspects of production and life. What properties of wood are related to the following uses?

The wood is relatively hard and can be used to make furniture and chopsticks.

Wood has strong bearing capacity and can be used as beams and columns

Wood can float on water and can be used to build boats

The branches of the tree are flexible and can be used to make baskets

A mature tree takes at least ten years to grow in nature. The world's forests are declining rapidly due to environmental pollution and artificial logging.

People have now begun to use other materials to replace wood, and even turn wood chips and wood scraps into artificial boards, which are widely used. What alternatives to wood do we know about?

Keywords: Free download of Chinese PPT courseware for the first volume of the third grade of the textbook version, PPT download of the ups and downs of materials in water, PPT download of materials around us, .PPT format;

For more information about the PPT courseware "Materials Around Us: The Sink and Float of Materials in Water", please click on the Materials Around Us ppt: The Sink and Float of Materials in Water ppt tag.

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Update Time: 2024-11-09

This template belongs to science courseware Third Grade Science Volume 1, Textbook Edition industry PPT template

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