| Category | Format | Size |
|---|---|---|
| Shanghai Science Edition 8th Grade Physics | pptx | 6 MB |
"Quality" Quality and Density PPT Courseware 9
Description
"Quality" Quality and Density PPT Courseware 9
Compare: What's changed?
Think about it: What has changed in these instances? What hasn’t changed?
Objects and Matter
Objects and substances are different. Objects are composed of substances.
Try to name an object and the materials it is made of
think:
1. What are the similarities and differences between a nail and a pin?
2. What are the similarities and differences between a glass of water and a bucket of water?
3. What is the difference between a reinforced concrete structure building and a wooden structure building of the same size?
Explore: Is there any relationship between mass and object shape, state and position?
Ask a question:
Conjecture or hypothesis:
design experiment:
1. If you mold a piece of plasticine into various shapes, will its mass change?
2. If ice melts into water, will its mass change?
in conclusion:
Quality has nothing to do with changes in the object's state, shape, and spatial location, and does not change with changes in the object's shape, state, or location.
quality
Mass is a fundamental property of objects;
The mass of an object is determined by the amount of matter contained in the object;
It has nothing to do with changes in the state, shape, and spatial location of the object, and does not change with changes in the shape, state, or location of the object.
example
Regarding quality, which of the following statements is correct ( )
A. After water turns into ice, its mass increases.
B. After the iron block is heated and then beaten into iron sheets, the mass becomes smaller.
C. The quality of physics textbooks is different in Nanjing and in Antarctica.
D. None of the above statements are correct
unit of mass
The unit of mass in the International System of Units: kilogram (kg)
Other units: milligram (mg), gram (g), ton (t)
Unit conversion:
1t=1000kg=103kg 1kg=1000g=103g 1g=1000mg=103mg
The masses of some common objects:
The mass of a stamp is approximately: 50mg
The mass of a middle school student is about 50kg
Mass of a pin: 80mg
Approximate mass of an apple: 150g
Mass of one yuan coin: 10g
The mass of a chicken is approximately: 2kg
The mass of an elephant is approximately: 2t
The mass of a physics book: 0.25kg
Mass of a whale: 120t
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For more information about the "Mass and Density Quality" PPT courseware, please click the Quality and Density ppt quality ppt tag.
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File Info
Update Time: 2024-08-05
This template belongs to Physics courseware Shanghai Science Edition 8th Grade Physics industry PPT template
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