Why Gold Does Not Change Color
為什麼黃金不會變色
Introduction
Scientists at Tulane University found why gold stays shiny. Gold atoms move to stop oxygen from changing the metal.
杜蘭大學的科學家發現了為什麼黃金能保持光澤。黃金原子會移動以阻止氧氣改變這種金屬。
Main Body
Scientists used computers to look at gold. They saw that gold atoms move into special patterns. These patterns stop oxygen from touching the gold. This makes gold very strong against air and water.
科學家利用電腦研究黃金。他們發現黃金原子會移動成特殊的圖案。這些圖案能阻止氧氣接觸黃金。這使得黃金對空氣和水具有極強的抵抗力。
This is important for factories. Gold is too strong to help some chemical reactions. If scientists stop the atoms from moving, gold can help make clean energy.
這對工廠非常重要。黃金太過穩定，無法協助某些化學反應。如果科學家能阻止原子移動，黃金就能幫助製造潔淨能源。
Pure gold does not change color. But some jewelry has other metals like copper. These other metals change color and look dirty. Some soaps and skin acids also make this happen.
純金不會變色。但某些珠寶含有其他金屬，例如銅。這些其他金屬會變色，看起來很髒。某些肥皂和皮膚酸性物質也會導致這種情況。
Conclusion
The study explains why gold stays shiny and how to use it better in factories.
這項研究解釋了為什麼黃金能保持光澤，以及如何在工廠中更好地運用它。
Vocabulary Learning
⚡ The "Something + Does Not + Verb" Rule
Look at this sentence from the text: "Pure gold does not change color."
When we want to say something is NOT true or NOT happening for a thing or a person, we use this simple bridge:
Thing does not Action
- Gold does not change
- Oxygen does not touch
💡 Quick Tip for A2: In speaking, we usually say "doesn't". Example: It doesn't change.
🛠️ Vocabulary: "Opposite" Words
To describe materials, use these pairs found in the text:
| Shiny | Dirty |
|---|---|
| Pure | Mixed (with other metals) |
| Strong | Weak |
How to use them: "The gold is shiny, but the copper is dirty."