Problem 11 - An Introduction to Physical Science

Question

Choose the word or phrase that best answers the question. Which description best describes a solid? A) It has a definite shape and volume. B) It has a definite shape but not a definite volume. C) It adjusts to the shape of its container. D) It can flow.

Step-by-Step Solution

Answer

A) It has a definite shape and volume.

Step 1: Understand the Definition of a Solid

A solid is a state of matter characterized by having both a definite shape and a definite volume. It does not change shape to conform to its container, unlike liquids and gases.

Step 2: Analyze the Options

Review each of the given options to identify which one accurately describes a solid: A) It has a definite shape and volume. B) It has a definite shape but not a definite volume. C) It adjusts to the shape of its container. D) It can flow.

Step 3: Eliminate Incorrect Options

Consider the characteristics of each option: B describes only having a definite shape, which is incorrect for a solid. C describes a property of liquids and gases, not solids. D also describes a property of liquids and gases that can flow.

Step 4: Confirm the Correct Answer

Option A is the only choice that accurately describes a solid, having both a definite shape and volume.

Key Concepts

states of matter

Matter exists in three primary states: solids, liquids, and gases. Each of these states has unique properties that distinguish them from one another. For instance, solids have a structured arrangement of particles, making them rigid.
Liquids, on the other hand, have particles that are more loosely packed, allowing them to flow and take the shape of their container.
Gases, with particles that are far apart, can expand to fill any container completely.
Understanding these differences is key to grasping the concept of states of matter.
Whether you're looking at a block of ice (solid), a glass of water (liquid), or steam from boiling water (gas), each demonstrates distinct behaviors based on its state.

solid characteristics

Solids have distinct characteristics that set them apart from liquids and gases. The most notable features include:

• Definite Shape: Unlike liquids and gases, solids do not change shape to fit their container. A cube of ice will remain as a cube, regardless of where it is placed.
• Definite Volume: Solids have a fixed volume that does not change, unlike gases which can expand or compress.
• Non-fluidity: Solids cannot flow like liquids or gases. Their particles are tightly packed, maintaining their position.

These characteristics are due to the strong intermolecular forces that hold the particles of a solid in fixed positions. Understanding these features helps explain why solids are used in structures and tools where rigidity and consistent volume are needed.

definite shape and volume

One of the most definitive properties of a solid is having both a definite shape and volume. This means:

• They hold their shape without needing a container. For example, a metal rod will remain a rod regardless of where it is placed.
• The volume of a solid does not change easily. While liquids and gases can be compressed or expand, solids hold a consistent amount of space.
• This feature is incredibly useful in construction and manufacturing, where precision and permanence are crucial.

By having a definite shape and volume, solids play an essential role in everyday objects, from the bricks used in buildings to the materials used in machinery. Grasping this concept is fundamental in understanding why different materials are chosen for specific tasks based on their state of matter.