For Each of the Following,indicate Whether a Physical or Chemical $\degree$

question 130

Essay

For each of the following,indicate whether a physical or chemical change occurs.
a.Mercury(II)oxide is heated and forms mercury metal (Hg)and oxygen gas (O₂).
b.Liquid mercury is cooled to -40 $\degree$ C,at which point it solidifies.
c.A glowing match is thrust into hot oxygen gas and bursts into flame.
d.Water vapor condenses on a cool surface.

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Definitions:

Exemplar

A specific instance, example, or case that is representative of a concept, category, or phenomenon.

Schema

An organized framework for representing knowledge that typically includes characters, plots, and settings and incorporates both general knowledge about the world and information about particular events. See also script and story grammar.

Classical

Often referring to classical conditioning, a learning process that occurs through associations between an environmental stimulus and a naturally occurring stimulus.

Family Resemblance

The concept of how members of a category share certain characteristics, though there may be no single characteristic common to all.