"Density" Quality and Density PPT Courseware 4

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"Density" Quality and Density PPT Courseware 4

Nature is composed of various substances. Different substances have different characteristics, such as color, hardness, smell, taste, etc. People distinguish and identify different substances based on these characteristics of substances.

What is your opinion?

Conjecture 1: The mass of the iron block is greater than the mass of the wood block?

Conjecture 2: Is the mass of a small piece of iron greater than the mass of a large piece of wood?

Conjecture 3: When comparing the masses of two objects, we should not just look at the materials, but also consider their volumes. I would also like to suggest trying it through experiments.

1. Explore “the relationship between mass and volume of objects”

1. Ask questions:

What is the relationship between an object's mass and its volume?

①What is the relationship between the mass and volume of objects of the same material?

②What is the relationship between the mass and volume of objects of different materials?

2. Conjectures and assumptions: The mass of an object and its volume ______ ___

3. Make plans and design experiments:

(1) Research objects: ____, _____ (more? less?)

(2) Physical quantities measured: ______, ______

(3)Measuring tools: ______, ____________

(4) Steps:

4. Conduct experiments and collect evidence:

(1) Take two wooden blocks with different shapes and volumes, use ______ and ____________ to measure the mass and volume, and find the ratio of mass to volume.

(2) Take two solid iron blocks with different volumes, use ______ and ___________ to measure the mass and volume, and find the ratio of mass to volume.

5. Analysis and demonstration:

(1) Compare 1 and 2 (or 3 and 4) to get:

①For the same substance, mass and volume ________;

②For the same substance, the ratio of mass to volume _______ is a ___ value, which is ______ with mass and volume.

(2) Compare 1 and 3 (or 2 and 4) to get:

The ratio of mass to volume of different substances is _________.

(3) The ratio of mass to volume may be related to _____,

It reflects a property of the substance itself.

In order to represent the above characteristics of different substances, the concept of ___density_ was introduced in physics.

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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: 2024-11-02

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

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