| Category | Format | Size |
|---|---|---|
| Zhejiang Education Edition Seventh Grade Science Volume 1 | pptx | 6 MB |
"Measurement of Quality" PPT courseware
Description
"Measurement of Quality" PPT courseware
Part One Content: Independent Learning:
1. Common units of quality and unit conversion
2. Understand the mass scale of different objects
Perceived mass unit: Please fill in the appropriate mass unit after the number
An egg is about 50
about 150
About 0.2
about 6
International prototype of the kilogram
The origin of the mass unit: The mass of 1 liter of distilled water at 4°C was originally specified as the mass unit, which became 1 kilogram. Accordingly, in 1878, a cylinder with a height and diameter of 39 mm was made from a platinum-iridium alloy. As shown on the left.
Measurement of quality PPT, part 2 content: Exercise: Use of balance
Require:
1. First learn the correct use of the balance on page 131 of the book;
2. Then work together with the tablemates to measure the quality of the oranges.
Kind tips:
The balance is a precision measuring tool. In order to maintain its accuracy, please do not hold the weight directly with your hands, and do not get the weight wet or dirty to avoid rust. Do not place wet objects and chemicals directly into the balance pan.
Quality Measurement PPT, Part 3: Extracurricular Assignments:
Can you design an experiment to weigh and measure the mass of a drop of water?
1. Place the balance on a horizontal table and move the cursor to the zero mark of the ruler. When the pointer is stationary, as shown in Figure 1. In order to balance the beam, the operation that should be performed at this time is ______________. When measuring the mass of a metal block with an adjusted balance, when the crossbeam is balanced, the position of the weight and wanderer on the right side of the balance is as shown in Figure 2, then the mass of the metal block is _______.
2. A classmate used a pallet balance to weigh the mass of an object. After adjusting the balance, he estimated that the mass of the object was about 50g. He put the object and the weight correctly into the plate and found that the pointer was obviously biased towards the index plate. to the left of the center line, then he should ( )
A． Reduce the weight B. Add weight
C． Move the balance nut on the right end of the beam to the right
D． Move the balance nut on the right end of the beam to the left
Keywords: Zhejiang Education Edition seventh grade science PPT courseware free download, quality measurement PPT download, .PPT format;
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"Measurement of Quality" PPT download:
"Measurement of Mass" PPT download Part 1: Think about it. Generally, which of the following objects contains more substances? 1. Which one, the large glass ball or the small glass ball, contains more glass? 2. Which one contains more iron, a hammer or a nail? 3. Which one contains more wood, desks or chairs? ..
"Measurement of Quality" PPT:
"Measurement of Quality" PPT Part One Content: Teaching Objectives 1. Know the unit of mass and know that the size of mass indicates the amount of material contained in an object; 2. Understand the structure, use and maintenance methods of the pallet balance. Teaching focus and teaching difficulties 1 .estimate the object’s...
File Info
Update Time: 2024-07-01
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