Lead (A Solid) May Be Changed into Mercury (A Liquid)

question 6

Multiple Choice

Lead (a solid) may be changed into mercury (a liquid) by

• A) dissolving the lead in acid so that it loses enough mass to have the same mass as mercury.
• B) grinding the lead to dust and then melting the dust.
• C) heating the lead to extremely high temperatures.
• D) none of these.

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Definitions:

Imitation

The action of using someone or something as a model and attempting to replicate their behavior, actions, or features.

Object Permanence

The understanding that objects continue to exist even when they cannot be seen, heard, or touched, typically developed during infancy.

Deferred Imitation

The imitation of people and events that occurred in the past.

Rooting Reflex

A natural reflex in newborns that helps them turn their head toward anything that strokes their cheek or mouth, facilitating the act of breastfeeding.