Explanation:
Glass is an amorphous solid because its internal arrangement of crystals lacks shape and forms.
Amorphous means without form.
- When a molten substance crystallizes with enough time in a stable environment, it has a well ordered crystalline structure to it. Such materials are said to be crystalline in nature.
- Some substances like glass are formed by rapid cooling and its molecules are not properly formed.
- This makes them to lack a well ordered arrangement of their molecules.
- The long range ordered arrangement seen in crystalline materials is non-existent in glass.
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The phase change is sublimation, so choice A.
Answer: I can't see the image
Explanation: N/A
SiAl/continental crust and SiMa occianic crust