"Material Changes and Us" Material Changes PPT Courseware

Description

"Material Changes and Us" Material Changes PPT Courseware

physical changes

Features: No new substances are produced

Chemical changes

Features: New substances are produced

Note: The process of a chemical change of a substance must involve a physical change.

Common phenomena: luminescence, heat release, color change, gas release, precipitation, and energy changes

The difference and connection between physical changes and chemical changes

Note: When judging the type of material change, you should not just look at whether there is a phenomenon, but also whether other substances are generated. Some chemical changes have no obvious phenomenon, and physical changes may be accompanied by obvious phenomena, such as light bulbs emitting heat.

1. Fill in the blanks.

1. Turn on the light switch, and the light will glow and heat, which is a ______ change.

2. When charcoal burns, it emits light and heat at the same time, which is a _______ change.

3. When plants perform photosynthesis, they produce fresh oxygen, which is a _____ change.

4. Put the starch into the water and stir. Finally, the starch will precipitate, which is a _____ change.

5. When carbon dioxide gas is blown into the clear lime water, a white precipitate will appear, which is a ______ change.

6. When ink is dropped into clear water, the blackening of the clear water is a ______ change.

7. When the balloon is inflated and let go, the air will flow out of the balloon, which is a ____ change.

choose

1. Which of the following changes does not produce new substances ( ).

A. Setting off fireworks B. Burning wood C. Salt dissolving in water D. Burning coal to generate electricity

2. Which of the following changes is a chemical change ( )

A. Melt iron and make a pot. B. Electrify water to obtain hydrogen and oxygen.

C. The length of the mercury inside the thermometer changes. D. The light is reflected back by the mirror.

3. Which of the following changes is a physical change ( ).

A. Gunpowder explosion B. Wood burning C. Wet clothes drying in the sun

judge

1. Material changes are everywhere and are closely related to our lives. ( )

2. Food must undergo many chemical changes before it can be converted into the nutrients our bodies need. ( )

3. The process of producing cement involves a series of complex physical and chemical changes. ( )

4. Gunpowder is one of the four great inventions in ancient my country. ( )

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For more information about the PPT courseware "Changes of Matter, Changes of Matter and Us", please click the "Changes of Matter ppt, Changes of Matter and Us" ppt tag.

"Material Changes and Us" Material Changes PPT download:

"Material Changes and Us" Material Changes PPT Download Part One: Import the new lesson and fill it out. 1. The world around us is made of _____, and matter changes. 2. Changes in matter are generally divided into two categories: ____________________. 3...

"Material Changes and Us" Material Changes PPT:

"Material Changes and Us" Material Changes PPT Part One: Material Changes The world around us is made of matter, and matter will change. Changes in matter are generally divided into two categories: physical changes and chemical changes. Chemical changes are accompanied by many phenomena...

"Material Changes and Us" Material Changes PPT Courseware 4:

"Material Changes and Us" Material Changes PPT Courseware 4 Material: The actual things that we can observe directly or indirectly The world around us is made of matter Material changes Changes of matter Changes of matter can generally be divided into physics Change and...

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Update Time: 2024-11-01

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

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