Crystallinity

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/crystallinity

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the amorphous state?Amorphous solids lack long-range order, exhibiting only short-range correlations between particles
2. Why can some solids be see‑through while others are cloudy?Clear solids usually have a regular crystal structure that lets light pass. Cloudy solids have many grain boundaries or disordered parts that scatter light, making them opaque.
3. How do scientists find out if a solid is crystalline?They shine X‑rays on it. When the X‑rays hit the regular lattice, they bounce in a pattern that shows the crystal structure. This technique is called X‑ray diffraction.

Lattice: A three-dimensional array of points defining the periodic arrangement of atoms or molecules in a crystal.
Amorphous Solid: A solid lacking the long-range, ordered structure characteristic of crystalline materials.
X-ray Diffraction (XRD): A technique that uses the scattering of X-rays by a material to determine its atomic or molecular structure.
Grain Boundaries: Interfaces between individual crystalline regions (grains) within a polycrystalline material.