"The Sinking and Floating of Potatoes in Liquid" PPT download of sinking and floating

Description

"The Sinking and Floating of Potatoes in Liquid" PPT download of sinking and floating

Part One Content: Collaborative Exploration

The rise and fall of the potato

Place the potatoes into two cups of liquid and observe how they sink and float.

Experiment instructions:

For the same potato, when the amount of liquid is the same, the only factor that affects the sinking and floating is the nature of the liquid.

experimental method:

Take a drop of each of the two cups of liquid, drop the liquid on the iron piece, heat it over the flame of an alcohol lamp, and observe the traces left after the liquid dries.

After heating, white particles were left on one of the iron pieces.

It means that other substances different from pure water are dissolved in the liquid.

Summary: It is not that dissolved salt in water can make potatoes float. If the concentration is not enough and the density of the liquid is not high enough, potatoes will not float. When the density of the salt solution is greater than the density of the potato, the potato can float.

PPT on the sinking and floating of potatoes in liquid, part 2: expansion and extension

The Dead Sea is the famous Great Salt Lake in West Asia, located in the rift valley between Jordan and Palestine. The Dead Sea area has a hot climate, strong evaporation, and the salinity of the lake water is as high as 300~332. Neither aquatic plants nor fish can survive in the lake, and there is very little vegetation along the coast, so it is called the Dead Sea. But the Dead Sea cannot drown anyone, and even people who can’t swim can enjoy leisure and entertainment in the Dead Sea.

A buoy is a navigation mark that floats on the water. It is anchored at a designated location to mark the channel, range, indicate shoals, obstacles, or a navigational aid sign indicating a special-purpose water surface.

PPT on the sinking and floating of potatoes in liquid, part 3: class summary

The properties of liquid can change the sinking and floating of objects. Only a certain concentration of liquid can change the sinking and floating of objects.

PPT on the sinking and floating of potatoes in liquid, Part 4: Classroom exercises

1. Judgment questions

1. Dissolve enough substances in the liquid so that the potato can float. ( )

2. Liquids of different concentrations have an impact on the sinking and floating of potatoes. ( )

3. Potatoes sink in clear water and float in concentrated salt water. ( )

2. Fill in the blanks

1. Use ( ) to explore the properties of unknown liquids.

2. The substances dissolved in the liquid are liquids different from ( ).

3. The reason for the change in the ups and downs of potatoes is ( ).

PPT on the sinking and floating of potatoes in liquid, Part 5: Homework

Make a cup of sugar-water solution and see if the potatoes float?

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For more information about the "Sink and Float Potatoes in Liquids" PPT courseware, please click on the "Sink and Float PPT Potatoes in Liquids" PPT tag.

"The Sinking and Floating of Potatoes in Liquid" PPT: Sinking and Floating:

"The Sinking and Floating of Potatoes in Liquid" Sink and Float PPT

Part One: The Rise and Fall of the Potato

Put the potatoes into two cups of liquid and observe how they sink and float.

Potatoes sink in one cup and float in another cup. Why?

"The Sinking and Floating of Potatoes in Liquids" Sinking and Floating PPT Courseware 3:

"The Sinking and Floating of Potatoes in Liquids" Sinking and Floating PPT Courseware 3 Demonstration Experiment Put a potato into a cup and it sinks; take out the potato and dry it, put it in another cup, but the potato floats! Why? How do you know if salt is added to a glass of water? Heating method:..

"The Sinking and Floating of Potatoes in Liquids" Sinking and Floating PPT Courseware 2:

"The Sinking and Floating of Potatoes in Liquids" Sinking and Floating PPT Courseware 2 Activity 1: Will a sinking object be subject to the buoyancy of water? Experiment plan: Research question: Will a sinking object be subject to the buoyancy of water? Required equipment: Stones , spring dynamometer, thin wire, measuring cup, water, etc..

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Update Time: 2024-11-16

This template belongs to science courseware Fifth Grade Science Volume 2, Textbook Edition industry PPT template

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