Materials：練習題

Which of the following materials is most likely to be attracted by a magnet?

When comparing the density of four different solid cubes of the same volume, a student finds the following masses:
Cube A: 10 g
Cube B: 25 g
Cube C: 5 g
Cube D: 50 g
Which cube is made of the densest material?

What is the main reason why copper is commonly used for making electrical wires in household appliances?

Which of the following materials is typically the best thermal insulator, making it suitable for keeping beverages hot in a thermos flask?

A material is described as being able to be hammered into thin sheets without breaking. Which physical property is being described?

State one advantage of using aluminum instead of iron to manufacture soda cans.

Explain why composites, such as fiberglass, are often preferred over pure polymers or pure ceramics in the construction of boat hulls.

Why are ceramics commonly used to make coffee mugs instead of materials like metals or plastics?

A manufacturer wants to design a new disposable water bottle.
(a) State two properties of plastics that make them a popular choice for making water bottles.
(b) Briefly explain one environmental problem caused by the disposal of plastic bottles.

An experiment was conducted to compare the hardness of three materials: A, B, and C. Material A can scratch B, but cannot scratch C. Material C can scratch both A and B.
(a) Arrange the materials in order of increasing hardness.
(b) Describe how a scientist would perform a scratch test to determine the relative hardness of two solid materials.