Material Hardness Testing Methods

The video tutorial explores the concept of material hardness by demonstrating how different materials react to being scratched by a nail. The experiment tests a variety of items, including a wax candle, plastic brick, popsicle stick, eraser, glass beaker, ceramic tile, bar of soap, coin, and cardboard. The results show which materials are easily scratched and which are not, providing a practical understanding of hardness. The video concludes with a light-hearted remark and encourages viewers to subscribe.

What is one method to test the hardness of a material?

• By observing its shape

• By seeing how easily it can be scratched by a nail

• By checking its color

• By measuring its weight

Which material was easily scratched by a nail?

• Glass beaker

• Wax candle

• Plastic brick

• Coin

Which of the following materials was not scratched by a nail?

• Popsicle stick

• Eraser

• Cardboard

• Plastic brick

How did the eraser respond to the nail test?

• It broke into pieces

• It was easily scratched

• It was not scratched at all

• It was slightly scratched

Which material was not affected by the nail test?

• Bar of soap

• Wax candle

• Ceramic tile

• Popsicle stick

What was the result of the nail test on the bar of soap?

• It shattered

• It was not scratched

• It was easily scratched

• It was slightly scratched

Which material was slightly scratched by the nail?

• Plastic brick

• Ceramic tile

• Cardboard

• Coin