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A. Fibrous C. Banded Illustrated here is the habit or a. formation structure b. growth pattern B. Bladed D. Cubic crystals c. cleavage shape d. crystal shape

A. Fibrous C. Banded Illustrated here is the habit or a. formation structure b. growth pattern B. Bladed D. Cubic crystals c. cleavage shape d. crystal shape

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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### Crystal Habits and Shapes **Illustrated here is the habit or ________** - a. formation structure - b. growth pattern - c. cleavage shape - d. crystal shape ### Types of Crystal Habits: **A. Fibrous**: - Image Description: A crystal with a fibrous habit appears as bundles of fibers or hair-like strands. This example showcases a mineral with greenish hues and thin, elongated fibers. **B. Bladed**: - Image Description: Bladed crystals are characterized by elongated, flat, and thin shapes resembling a knife blade. The crystals in this image are white and seem to grow in parallel formations. **C. Banded**: - Image Description: Banded crystals show layers or bands of different colors or textures. The displayed specimen has concentric bands of various shades of brown, beige, and white, forming an intricate pattern. **D. Cubic Crystals**: - Image Description: Cubic crystals exhibit a crystal habit where the crystals form in shapes that have square or rectangular cross sections. This illustration shows clear, square-faced crystals growing in a group. **Answer Explanation**: The habit or shape described here refers to the characteristic external shapes displayed by these crystals, which correspond to "d. crystal shape." #### Visual Analysis: - **Fibrous (A)** showcases the thin, thread-like appearance of certain crystals. - **Bladed (B)** highlights flat, elongated shapes resembling blades. - **Banded (C)** depicts crystals with layered or banded patterns. - **Cubic Crystals (D)** presents crystals forming cubic shapes. This educational display helps illustrate the diversity in crystal shapes and habits by using visual examples.
Transcribed Image Text:### Crystal Habits and Shapes **Illustrated here is the habit or ________** - a. formation structure - b. growth pattern - c. cleavage shape - d. crystal shape ### Types of Crystal Habits: **A. Fibrous**: - Image Description: A crystal with a fibrous habit appears as bundles of fibers or hair-like strands. This example showcases a mineral with greenish hues and thin, elongated fibers. **B. Bladed**: - Image Description: Bladed crystals are characterized by elongated, flat, and thin shapes resembling a knife blade. The crystals in this image are white and seem to grow in parallel formations. **C. Banded**: - Image Description: Banded crystals show layers or bands of different colors or textures. The displayed specimen has concentric bands of various shades of brown, beige, and white, forming an intricate pattern. **D. Cubic Crystals**: - Image Description: Cubic crystals exhibit a crystal habit where the crystals form in shapes that have square or rectangular cross sections. This illustration shows clear, square-faced crystals growing in a group. **Answer Explanation**: The habit or shape described here refers to the characteristic external shapes displayed by these crystals, which correspond to "d. crystal shape." #### Visual Analysis: - **Fibrous (A)** showcases the thin, thread-like appearance of certain crystals. - **Bladed (B)** highlights flat, elongated shapes resembling blades. - **Banded (C)** depicts crystals with layered or banded patterns. - **Cubic Crystals (D)** presents crystals forming cubic shapes. This educational display helps illustrate the diversity in crystal shapes and habits by using visual examples.
### Understanding Molecular Geometry: Tetrahedral Shape **Diagram Explanation**: The diagram illustrates the tetrahedral geometry frequently encountered in chemistry. This structure consists of a central atom, in this case, a silicon ion (Si⁴⁺) shown at the center of the diagram, surrounded by four oxygen ions (O²⁻) positioned at the corners of a tetrahedron. The silicon ion acts as the core of the structure, and the surrounding oxygen ions are symmetrically arrayed around it. The tetrahedral shape is a common geometry in molecular structures, particularly in compounds involving a central atom bonded to four substituents. **Text**: The picture represents a _______ (look up what this really is, the picture is symbolic of something made of balls/atoms, but we are talking about this picture that makes a concept.) a. golden triangle b. a solid with 4 pointy corners c. a pyramid with 5 pointy corners. d. a shape that can’t fill space. **Correct Answer: b. a solid with 4 pointy corners** This structural depiction of a tetrahedron is essential in understanding various molecular geometries, chemical bonding, and spatial arrangements in complex molecules.
Transcribed Image Text:### Understanding Molecular Geometry: Tetrahedral Shape **Diagram Explanation**: The diagram illustrates the tetrahedral geometry frequently encountered in chemistry. This structure consists of a central atom, in this case, a silicon ion (Si⁴⁺) shown at the center of the diagram, surrounded by four oxygen ions (O²⁻) positioned at the corners of a tetrahedron. The silicon ion acts as the core of the structure, and the surrounding oxygen ions are symmetrically arrayed around it. The tetrahedral shape is a common geometry in molecular structures, particularly in compounds involving a central atom bonded to four substituents. **Text**: The picture represents a _______ (look up what this really is, the picture is symbolic of something made of balls/atoms, but we are talking about this picture that makes a concept.) a. golden triangle b. a solid with 4 pointy corners c. a pyramid with 5 pointy corners. d. a shape that can’t fill space. **Correct Answer: b. a solid with 4 pointy corners** This structural depiction of a tetrahedron is essential in understanding various molecular geometries, chemical bonding, and spatial arrangements in complex molecules.
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