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6th grade Science Unit 3 Pretest — 20 Questions
Armstrong, Kennedee
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Question 19.
The table gives some traits of a mineral called calcite.
image a4bd05531347429eb582de1817754ec4
According to the Mohs hardness scale, any substance can be scratched by a substance with a higher hardness rating. Things with equal hardness can only scratch each other with a good deal of effort. The table below lists the hardness of common materials.
image 0ca6861112344160accd9174458340ef
A student has several samples of rocks. A rock that is made of calcite will most likely have which group of characteristics?
light-colored, cube-shaped, easily scratches a fingernail
light-colored, can be scratched by a fingernail or copper penny, makes a white streak
white in color, can be scratched by a steel file, makes a brown streak
transparent in color, 6-sided shape, easily scratches a glass plate or a steel knife
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Fullscreen
6th grade Science Unit 3 Pretest — 20 Questions
Armstrong, Kennedee
All Questions
A
Review Summary
Finish Later
Question 19.
The table gives some traits of a mineral called calcite.
image a4bd05531347429eb582de1817754ec4
According to the Mohs hardness scale, any substance can be scratched by a substance with a higher hardness rating. Things with equal hardness can only scratch each other with a good deal of effort. The table below lists the hardness of common materials.
image 0ca6861112344160accd9174458340ef
A student has several samples of rocks. A rock that is made of calcite will most likely have which group of characteristics?
light-colored, cube-shaped, easily scratches a fingernail
light-colored, can be scratched by a fingernail or copper penny, makes a white streak
white in color, can be scratched by a steel file, makes a brown streak
transparent in color, 6-sided shape, easily scratches a glass plate or a steel knife
Notes
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© 2025 Renaissance Learning, Inc. All rights reserved.
Answers
GPT-5 mini
Answer: light-colored, can be scratched by a fingernail or copper penny, makes a white streak.
Reason: Calcite is light/transparent to white and leaves a white streak. Its Mohs hardness is about 3, so a copper penny (around 3) can scratch it; a fingernail (≈2.5) is softer and usually won’t, but option 2 is the best match of the choices because of the white streak and light color.
Reason: Calcite is light/transparent to white and leaves a white streak. Its Mohs hardness is about 3, so a copper penny (around 3) can scratch it; a fingernail (≈2.5) is softer and usually won’t, but option 2 is the best match of the choices because of the white streak and light color.