Scratch, Shine and Streak
5-PS1-3
Read the record, then answer the questions.
Four Unlabeled Minerals
Test results for four unlabeled minerals, each tested the same five ways. WHAT EACH MINERAL DID Mineral A: scratched by a fingernail, pearly shine, white streak, not pulled by a magnet, no fizz Mineral B: scratches glass, glassy shine, no streak, not pulled by a magnet, no fizz Mineral C: not scratched by a coin, metallic shine, black streak, pulled by a magnet, no fizz Mineral D: scratched by a coin but not a fingernail, glassy shine, white streak, not pulled by a magnet, fizzes with vinegar Tests: scratch, shine, streak on a rough white tile, magnet, a drop of vinegar.
- 1. Which single test picks out mineral C on its own?
- 2. A new mineral is scratched by a fingernail and leaves a white streak. Which is it most like?
- 3. Which mineral was pulled by a magnet?
- 4. A and D both leave a white streak. Which test tells them apart?
- A.It is magnetic
- B.It is melting
- C.It reacts with the vinegar, which is a property you can test
- A.How shiny the mineral is
- B.The color of the powder a mineral leaves when rubbed on a rough white tile
- C.How heavy the mineral is
- A.One test is never useful
- B.More tests always give the same result
- C.One test may give the same result for two different minerals
- A.Streaks are always black
- B.Fool's gold is real gold
- C.A streak test can tell apart minerals that look alike
- A.Decide they are different
- B.Stop testing
- C.Try another test, or consider that they may be the same mineral
- A.How heavy it feels
- B.The way its surface reflects light
- C.How hot it gets in the sun
LessonPrint · 5-PS1-3 · Set 7 · free to copy for classroom use