"The Mass of Objects and Its Measurement" Scale, Mass and Density of the Material World PPT Courseware 3

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"The Mass of Objects and Its Measurement" Scale, Mass and Density of the Material World PPT Courseware 3

Question: Compared with an "iron nail" and an "iron door", what are the similarities between the two, and what are the differences between them?

1. The quality of the object:

1. Definition: The amount of matter contained in an object is called the mass of the object.

2. Symbol: "m"

3. Unit:

(1) International unit: kilogram “kg”

(2) Commonly used units: tons (t), grams (g), milligrams (mg), micrograms (μg)

(3) Conversion relationship:

The order from largest to smallest is:

tons kilograms milligrams micrograms

(The advance rate between adjacent units is 1000)

(4) Estimation quality:

Two cents: 1 gram

Mass of two bottles of mineral water: 1 kg

Adult mass: 60 kg

Mass of 1 egg: 60 grams

pallet balance

1. Structure:

2. How to use:

(1) Base level

Place the balance on a level table where it is easily accessible;

(2) Return the game code to zero

Use tweezers to gently move the scale to the zero position on the left side of the ruler.

(3) Cross beam adjustment

Adjust the balance nut to balance the beam.

Left to right, right to left

Symbols of balance:

The sign that the beam is balanced is that the pointer points to the center line of the index plate, or the number of squares that swing left and right is equal.

Pay attention to the reading of the game code:

a reads the left side of the game code;

b Don’t estimate the reading, read whichever side is closer to the scale line. Moving the weight is equivalent to adding a small weight to the right disk.

Precautions:

(1) Cannot exceed the maximum range;

(2) Keep the balance dry and clean;

(3) Do not move the weights or pick up and place weights by hand.

(4) Once the balance is adjusted and balanced, the balance nut is not allowed to be adjusted again during the measurement process.

Exercise 1

1. Convert the following units:

(1) The mass of a whale is approximately: 1.5×105Kg=________t;

(2) The mass of one tablet is approximately:

5×10-4 Kg=___________mg.

2. The mass of a duck is approximately ( )

A. 2×105g B． 2×106mg

C. 2×10-3kg D. 2×10-5t

3． Student Xiaohong wants to measure the mass of a wooden block. The measurement method is as shown in the picture. From the picture, it can be seen that the main mistakes made by Xiaohong during the experiment are:

(1) The object and weight are placed upside down;

(2) Use your hands to pick up the weight;

(3) The game code is not reset to zero.

4. As shown in the figure, when adjusting the balance of the balance beam, it is found that the pointer is biased to the left side of the index plate (balance plate). At this time, the balance nut on the right end of the balance beam should be adjusted to the right (fill in "left" or "right").

5. In order to check whether the instant noodles he bought in a 132g package were sufficient, a classmate measured it with an adjusted balance. When the balance is balanced again, the mass of the weight and the scale indication are as shown in the figure, then the mass of the instant noodles he measured is ____g.

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For more information about the "Scale, Mass and Density of the Material World, the Mass of Objects and Their Measurement" PPT courseware, please click the Scale, Mass and Density of the Material World ppt, the Mass of Objects and its Measurement ppt tag.

"The Mass of Objects and Its Measurement" Scale, Mass and Density of the Material World PPT Courseware 5:

"The Mass of Objects and Their Measurement" Scale, Mass and Density of the Material World PPT Courseware 5 Review Objectives: 1. Be able to use the scale correctly and measure the length and read it correctly 2. Understand that mass is an attribute of matter and does not depend on the matter. Changes in shape, state, position...

"The Mass of Objects and Its Measurement" Scale, Mass and Density of the Material World PPT Courseware 4:

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"The Mass of Objects and Its Measurement" Scale, Mass and Density of the Material World PPT Courseware 2:

"The Mass of Objects and Their Measurement" PPT Courseware 2 on the Scale, Mass and Density of the Material World. Give it a try, you can do it. Please classify the glass pieces, small iron nails, iron blocks, glass bottles, wooden blocks, and toothpicks; say it. On what grounds are they classified and how many categories are they divided into? Think about it,...

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Update Time: 2024-11-22

This template belongs to Physics courseware Beijing Normal University eighth grade physics volume one industry PPT template

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