Mrs Weston Asks Colin If He Wants His Sandwich in One

question 211

Multiple Choice

Mrs. Weston asks Colin if he wants his sandwich in one piece, or cut into two pieces. Colin asks her to keep it in one piece, because he isn't hungry enough to eat two pieces. Colin's answer suggests that he:

• A)has not achieved object permanence.
• B)does not understand reversibility.
• C)does not yet understand conservation.
• D)has mastered the concept of egocentrism.

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Definitions:

Boiling Points

The temperature at which a substance changes from a liquid to a gas, varying depending on pressure and substance identity.

Ketones

Organic compounds characterized by the presence of a carbonyl group (C=O) bonded to two other carbon atoms, important in many biochemical processes and industrial applications.

Ethers

A group of organic substances identified by the presence of an oxygen atom linked to two alkyl or aryl groups.

Ester Functional Group

A chemical functional group derived from an acid where at least one –OH (hydroxyl) group is replaced by an –O– (oxy) group.