Observe the mineral below and identify it. When tested for hardness, a penny does not scratch it but glass does.
O A. Taenite: No cleavage, hackly fracture, metallic luster, no reaction to acid, gray streak, hardness 5
B. Olivine: 2 planes of cleavage at 90 degree angles, glassy luster, no reaction to acid, no streak, hardness 6.5
C. Calcite: 3 planes of cleavage, glassy luster, reacts to acid, white streak, hardness 3.
D. Plagioclase Feldspar: 2 planes of cleavage at 90 degree angles, pearly luster, no reaction to acid, white streak, hardness 6.5
Reset Selection
Answers: 1
Another question on Biology
Biology, 21.06.2019 12:30
Over time the trees in african have increased in length. many species have had to adapt to this change in order to survive. which of the following is a structural adaptation that has the african giraffe meet this change? question options: the african giraffe has become a faster at running from its predators. the african giraffe's neck has increased in size over the years. the african giraffe have moved to another part of africa. the african giraffe has not adapted and struggles to survive.
Answers: 1
Biology, 22.06.2019 03:00
Sediment layers stop lateral spreading when: they encounter a barrier they encounter an opposing current they run out of additional sedimentary material
Answers: 2
Biology, 22.06.2019 14:20
What term describes a doctor who becomes a specialist by meeting standards beyond those of getting a license and passing a test in the specialty area?
Answers: 1
You know the right answer?
Observe the mineral below and identify it. When tested for hardness, a penny does not scratch it but...
Questions
Mathematics, 12.12.2020 17:10
