The Unmortared Marvels: The Art of Dry Stone Walls - Structure and Feature of Descriptive Text (Grade 8)

According to the passage, what is the term for the slight inward slope of a dry stone wall's face?

• Hearting

• Through stone

• Batter

• Mortar

Answer explanation

The passage explicitly states, 'The wall is also constructed with a slight inward slope on its faces, known as a "batter," which directs the weight inward and downward, increasing its stability.'

How does the author primarily structure the passage to develop the concept of dry stone walls?

• By comparing and contrasting dry stone walls with modern mortared walls in each section.

• By presenting a chronological history of wall-building techniques from ancient to modern times.

• By stating a central definition, then explaining the principles of stability, and finally describing the components and roles.

• By arguing against the use of mortar and providing evidence for why gravity and friction are superior.

Answer explanation

The text is organized by first defining what a dry stone wall is (no mortar), then explaining the principles that make it stable (batter, points of contact), and then detailing its parts (hearting, through stones) and its broader significance. This shows a clear descriptive structure.

Categorize the following phrases from the text based on their function within a paragraph.

Groups:

(a) Introduces a Key Idea or Component

,

(b) Explains the Effect or Purpose of an Idea

• Directing weight inward and downward

• The idea that every stone has a purpose

• Applying more friction to prevent wobbling

• The principle of using a 'batter'

• The concept of 'hearting'

• Tying the two sides of the wall together

Answer explanation

The first category includes phrases that name a concept or principle ('hearting,' 'batter,' 'purpose'). The second category includes phrases that explain the result or function of those concepts (tying sides, directing weight, preventing wobbling), thus refining the key ideas.

What is the primary function of the sentence 'Instead of using a binding agent like cement...' in the opening section of the text?

• To list the materials needed to build a modern wall.

• To argue that cement is an inferior building material.

• To provide a historical timeline of construction methods.

• To refine the definition of a dry stone wall by clarifying what it is not.

Answer explanation

The previous sentence states the walls lack mortar. This sentence refines that key concept by giving a specific example of a binding agent (cement) that is not used, which helps the reader better understand the defining characteristic of a dry stone wall.

Match each sentence or phrase from the passage to the structural role it plays in developing a concept.

• Provides a specific descriptive detail to define a component.

• "Ecologically, the small gaps and crevices within the walls provide crucial habitats..."

• Shifts the focus to a new, related aspect of the main subject.

• "...which are large, flat stones that span the entire width of the wall..."

• Acts as a transition to introduce the topic of the section.

• "To begin with, the longevity of a dry stone wall depends on a few core principles."

• Summarizes how several details work together to achieve a result.

• "This careful engineering channels the force of gravity to lock the structure together..."

Answer explanation

The phrase 'To begin with' signals a new topic. The description of 'through stones' defines them. The 'careful engineering' sentence summarizes the effect of the principles just mentioned. The word 'Ecologically' signals a shift in topic from construction to environmental role.

A descriptive text often moves from 'identification' of a subject to 'description' of its features. Analyze how the text's introduction serves as the 'identification' and how later sections provide the 'description.' Explain how this structure helps a reader understand the topic of dry stone walls, using specific evidence from the text.

Answer explanation