Combining the two clear colorless liquids is a chemical change because a different solid substance is formed. Tell students that a precipitate is an insoluble solid that forms when two solutions are combined and react chemically.
I think they test ideas about chemical evolution by doing experiments. Hope this helps
Answer:
Tree sap flows over the leaf and preserves it.
Explanation:
Amber would preserve the image.
Because people make those substance out of other things
Answer:
Oxygen and sulfur have similar chemical properties because both elements have six electrons in their outermost electron shells. Indeed, both oxygen and sulfur form molecules with two hydrogen atoms: water and hydrogen sulfide
Explanation:
