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. A and D both leave a white streak. Which test tells them apart?
- 2. What claim does this record support?
- 3. Which mineral scratched glass?
- 4. Why was every mineral given the same five tests?
- A.Finding how hard they are
- B.Picking that one out from the rest
- C.Telling the other three apart
- A.The color of the powder a mineral leaves when rubbed on a rough white tile
- B.How heavy the mineral is
- C.How shiny the mineral is
- A.One test may give the same result for two different minerals
- B.More tests always give the same result
- C.One test is never useful
- A.A streak test can tell apart minerals that look alike
- B.Streaks are always black
- C.Fool's gold is real gold
- A.Stop testing
- B.Decide they are different
- C.Try another test, or consider that they may be the same mineral
- A.One a fingernail can scratch
- B.One a coin cannot scratch
- C.One that scratches glass
LessonPrint · 5-PS1-3 · Set 12 · free to copy for classroom use