The Soduim Hydroxide is just lye. It’s a caustic solution used in lots of things like soap, paper and metal processing.
Copper Sulfate gets its blue color from light energy that excites the electrons. It’s an anti microbial and used with wellness healing. Also has agricultural uses as well. Hope this helps you.
Answer:
B. Fossil
Explanation:
According to National Geographic, "Fossils are the preserved remains, or traces of remains, of ancient organisms." When you find the impression of a leaf, the leaf imprint is the preserved remains of the leaf.
I know this sounds silly but I just took the test they were made in the stars or B
