Metals and Non-metals: Properties and Restoration

These vocabulary flashcards cover the properties of metals and non-metals, the process of restoring metal shine, and the steps of the scientific method as detailed in the lecture transcript.

Materials

The substances from which things are made, characterized by properties that do not change.

Hardness (Metals)

A property of metals where they resist scratching and deformation.

Shiny

A lustrous appearance typical of metals.

Malleable

A property of metals that allows them to be hammered or pressed into thin sheets without breaking.

Ductile

A property of metals that allows them to be drawn out into thin wires.

Fusible

A property of metals where they melt at relatively low temperatures compared to some non-metals.

Electrical Conductivity

The ability of a material to allow electricity to flow through it easily.

Thermal Conductivity

The ability of a material to transfer heat efficiently.

Non-metals

Materials typically characterized as being dull, brittle, and having poor thermal and electrical conductivity.

Brittle

A property of non-metals describing their tendency to break or shatter when subjected to stress.

Tarnish (Copper Oxide)

The substance formed on copper surfaces due to a reaction between the metal and oxygen, which can be removed using an acid and salt mixture.

Vinegar

A substance identified as an acid used in combination with salt and lemon juice to clean copper coins.

Hypothesis

A step in the scientific method where a proposal is developed, such as suggesting a chemical substance will make copper coins shiny again.

Scientific Method

A series of steps including asking a question, research, hypothesis development, testing, observation, analysis, and drawing a conclusion.

Metals

A category of materials that are typically hard, shiny, malleable, ductile, and good conductors of heat and electricity.

Dull

The appearance of non-metals, which lack a shiny surface.