1. Pick the wrong statement about the fracture.
a) It is the broken surface of a mineral along the direction of cleavage
b) It is the broken surface of a mineral in a direction other than that of cleavage
c) In some cases it becomes a characteristic property of a mineral
d) Even and uneven are examples of fractures
Explanation: The appearance of the broken surface of a mineral in a direction other than that of cleavage is generally expressed by the term fracture. In some cases, fracture becomes a characteristic property of a mineral.
2. The term which means, rough woody fracture is ___________
a) Uneven
b) Conchoidal
c) Splintry
d) Hackly
Explanation: When the mineral breaks with a rough woody fracture resulting in rough projection at the surface it is known as sprintly fracture. Example, Kyanite.
3. The behaviour of a mineral towards the forces that tend to destroy it is called ___________
a) Hardness
b) Resistance
c) Tenacity
d) Crystal degree
Explanation: The behaviour of a mineral towards the forces that tend to break, bend, cut or crush it is described by the term tenacity.
4. The property of a mineral by virtue of which it can be cut with a knife is __________
a) Parting
b) Sectile
c) Malleable
d) Ductile
Explanation: The behaviour of a mineral towards the forces that tend to break, bend, cut or crush is described by the term tenacity. Thus, when a mineral can be cut with a knife, it is described as sectile.
5. Mica is __________
a) Flexible
b) Rigid
c) Flexible and elastic
d) Elastic
Explanation: Some minerals are not only flexible but elastic, that is, they regain their shape when the force applied on them is removed. Micas are the best example. Hence they are both flexible and elastic.
6. When the mineral occurs in flattened or square form, it is called __________
a) Tabular
b) Elongated
c) Batroidal
d) Box
Explanation: The mineral occurs in the form of a flattened, square, rectangular or rhombohedral shape if it is said to be tabular. In other words, flattening is conspicuous compared to lengthwise elongation.
7. Example for elongated structure is __________
a) Calcite
b) Beryl
c) Orthoclase
d) Barite
Explanation: When the mineral is in the form of a thin or thick elongated, column-like crystals, it is said to be elongated. For example, Beryl.
8. Kyanite shows which form?
a) Columnar
b) Elongated
c) Bladed
d) Tabular
Explanation: The mineral appears as if composed of thin, flat, blade-like overlapping or juxtaposed parts, if it said to be bladed. Example: Kyanite.
9. Chromite shows which type of structure?
a) Granular
b) Globular
c) Reniform
d) Mammillary
Explanation: The mineral occurs in the form of densely packed mass of small garin-like crystals, in the case of globular structure. Example: Chromite.
10. Malachite shows which type of structure?
a) Reniform
b) Globular
c) Mammillary
d) Granular
Explanation: Mammillary is similar to globular but the projections are conspicuous in size, overlapping in arrangement and rounded in shape, best example is malachite.