GED Science TestPhysical ScienceEasy
A student is investigating the properties of different materials. They observe that a certain material is shiny, conducts electricity well, and can be hammered into thin sheets without breaking. Based on these observations, what type of material is the student most likely examining?
- AA metal
- BA semiconductor
- CA polymer
- DA ceramic
Show answer & explanationAnswer & explanation
Correct answer: A. A metal
The observed properties—shininess, good electrical conductivity, and malleability (can be hammered into thin sheets)—are characteristic features of metals. Ceramics are typically brittle and non-conductive, polymers are generally insulators and not shiny, and semiconductors have conductivity between conductors and insulators.
Why the other options are wrong
- B. Semiconductors have intermediate conductivity and don't typically share all these properties.
- C. Polymers are generally poor conductors of electricity and lack a metallic luster.
- D. Ceramics are typically brittle and poor conductors of electricity.
Metallic Properties
Metals are elements characterized by properties such as luster, high electrical and thermal conductivity, malleability, and ductility.
- Luster: shiny appearance
- Conductivity: excellent conductors of heat and electricity
- Malleability: can be hammered into thin sheets
- Ductility: can be drawn into wires
Memory trick: Shiny Conductors Hammered Easily are Metals