Metals meet acids
Answers are for parents and teachers.
1
Draw a before-and-after table for the coin in vinegar test.
Before: dull coin. During: in vinegar and salt. After: brighter coin.
2
Write one sentence: why do we not use flame near hydrogen?
Hydrogen burns easily.
3
Write the safety rules for a bubbling test at home.
Goggles, a grown-up, an open cup on a tray, no tasting, no strong cleaners.
4
Explain how a new substance differs from the metal.
It is not shiny, and it does not bubble with acid.
5
Ask a grown-up where old metal things go when they are thrown away.
Answers differ; some go to be recycled.