"Density" Quality and Density PPT Courseware 6

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"Density" Quality and Density PPT Courseware 6

1. The “change problem” of physical quantities

(Select "unchanged", "increasing" or "getting smaller")

1. When a certain amount of water freezes into ice, its mass ____, density ____, and volume ____.

2. If a piece of iron is cut into half, its mass ____, volume ____, and density ____.

3. There is a cylinder filled with oxygen in the ICU, with a density of 5kg/m3. After half of it is used by emergency patients, the remaining oxygen in the cylinder has a mass of ____, a volume of ____, and a density of ____.

2. The problem of proportion

1. The volumes of two objects A and B are the same, and the ratio of their masses is 2:3. Then the ratio of the densities of the two objects A and B is ____.

2. Two objects C and D. The density of C is twice that of D, and the mass of D is 1/2 of C. Then the ratio of the volumes of the two objects C and D is ____.

3. For two objects E and F, the density ratio is 1:2 and the volume ratio is 3:4, then the mass ratio is _____; if object E is cut off by 2/3 and object F is cut off by 1/3, the two objects The ratio of the densities of the remainder is _____.

3. Multiple choice questions

1. Which of the following statements about density is correct ( )

A. Objects with high density must have high mass

B. The density of a solid must be greater than the density of a liquid

C. A large object must have a high density

D. An object with high density must have a large mass per unit volume.

2. Which of the following statements is incorrect ( )

A. Two objects with equal mass do not necessarily have the same volume.

B. Two objects with equal volumes must have equal masses.

C. Solid objects composed of the same material must have the same mass when their volumes are equal.

D. For solid objects composed of the same material, the mass is proportional to the volume.

3. Compared with ordinary biscuits, the advantage of compressed biscuits carried by field troops when marching is that when the quality is equal, its ( )

A. Low density and small volume

B. Same density, small volume

C.High density and large volume

D.High density and small volume

4. Calculation questions

1. A bottle can hold up to 1kg of water, so how much alcohol can it hold at most?

2. A glass bottle with a mass of 0.25kg has a total mass of 1.5kg when filled with water; if it is filled with a certain liquid, the total mass is 1.75kg, then what is the density of this liquid?

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For more information about the "Density, Mass and Density" PPT courseware, please click on the Density ppt Quality and Density ppt tab.

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Update Time: 2024-10-19

This template belongs to Physics courseware People's Education Edition Physics for Grade 8, Volume 1 industry PPT template

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