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"Material Changes and Us" Material Changes PPT
Part One: Changes in Matter
The world around us is made of matter, and matter changes. Changes in matter are generally divided into two categories: physical changes and chemical changes. Chemical changes are accompanied by many phenomena, the most important feature of which is the production of new substances. During the chemical change of a substance, a physical change must occur.
Material Changes and Us PPT, Part 2: Material Changes and Our Lives
We process wood and make it into tables, stools and other furniture for our use; when guests come, they make a cup of tea, and the substances in the tea leaves dissolve into hot water; we use the principle of thermal expansion and contraction of substances to make thermometers...
Material changes have a great relationship with our lives!
The food we eat every day goes through many chemical changes before it enters our body and becomes the nutrients our body needs.
The production process of cement used in construction involves a series of complex physical and chemical changes. Limestone and clay are first mixed evenly in a certain proportion, then calcined at high temperature, ground finely, and finally turned into cement.
Beautiful fireworks, when they explode in the air, violent chemical changes occur, producing colorful colors.
Due to the sharp increase in the consumption of fossil fuels such as coal and oil, a large amount of carbon dioxide is produced, which increases the carbon dioxide content in the air, leading to global climate warming, soil desertification, and melting of continental and polar glaciers, putting tremendous pressure on the global environment.
Material Changes and Us PPT, Part 3: Making Drinks
What's your favorite drink? Want to make your own drink?
orange juice drink
Squeeze the juice from a peeled orange and add a small amount of water to make an orange juice drink. It tastes pretty good, but a little sour. If you add a spoonful of sugar, it will taste better than orange juice bought in the store!
lemonade
In a glass of water, add two spoons of sugar, a small amount of citric acid, and a small spoonful of baking soda. The resulting drink will bubble. This is lemon soda.
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"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...