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Which of these pearls are the most valuable in the world?
Question 1:
Which of these pearls are the most valuable in the world?
A.
Natural pearls with the most unusual shapes
B.
Natural pearls that are perfectly spherical
C.
Cultured pearls with spherical shape
D.
None of these
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Trivial Practice Quiz science-technology - Test 118 | Englishfreetest.com
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15 questions
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Some questions from the same exam
Mercury has a moon called Celsius.
The largest known impact crater on Mercury is named what?
From our point of view on Earth, Mercury goes through different phases, just like our Moon.
What is the mean temperature on the surface of Mercury?
What is the basic chemical compound that natural pearls consist of?
Pearls come in many shapes and sizes. What term refers to pearls with irregular shapes?
A pearl can be produced naturally by almost any shelled mollusk. What triggers the process of pearl formation?
The iridescence of pearls depends on the number and thickness of the nacre layers. Which of these combinations provides the most iridescent pearl?
Which of these pearls are the most valuable in the world?
Which of these methods is a reliable way to distinguish a natural pearl from a cultured one and a fake one?
What is the name of the largest known pearl on the planet?
What kind of pearls are the so-called Keshi pearls?
In which of these places natural pearl hunting on a large scale has survived until modern times?
In which of these unusual colors can natural pearls come?
The B vitamins group was once thought to be a single vitamin. There are now eight officially recognized B vitamins referred to as vitamin B complex. Which of the following is not a vitamin from the B group?
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