Natural Concepts ____

question 83

Multiple Choice

Natural concepts ____.

• A) have fuzzy boundaries
• B) are usually learned formally
• C) usually use rigid rules to define their elements
• D) are typically universally held by all people

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Definitions:

Caldera

A vast crater on a volcano, often resulting from a major eruption and subsequent collapse of the volcano's opening.

Magma

Igneous rocks form from this liquid rock that exists below the Earth's surface, cooling and solidifying over time.

Past Eruptions

Historical instances of volcanic activity where molten rock (lava), volcanic ash, and gases were expelled from a volcano.

Central Crater

The main depression at the summit of a volcano, formed by explosive ejection of material and collapse of the area above the magma chamber.