A) Measuring precise electrical conductivity
B) Determining the age of rocks
C) Calculating exact chemical composition
D) Roughly identifying minerals

A) It is a liquid substance
B) It reacts with atmospheric gases
C) It is a rock made of several minerals
D) Its hardness changes based on temperature

A) The best grinding medium to use
B) The total volume of the product
C) The magnetic properties of the ore
D) The color of the final powder

A) Electronic manufacturers
B) Textile production
C) Food processing
D) Agriculture

A) It is too expensive to use
B) Lack of precision
C) It cannot be used on solids
D) It is only valid for metals

A) 10
B) 1
C) 2
D) 7

A) 3
B) 5
C) 8
D) 1

A) 2–4
B) 9–10
C) 7–9
D) 5–6

A) 4–5
B) 2–3
C) 6–6.5
D) 8–9

A) 1
B) 4
C) 6
D) 9

A) X-ray scanners
B) Scratch kits
C) Magnifying thermometers
D) Chemical titration sets

A) Mixtures cannot be scratched
B) Hardness may be difficult to determine
C) Mixtures always have a hardness of zero
D) The scale only applies to liquids

A) Power cables
B) Cover glass
C) Plastic casing
D) Wiring insulation

A) Friedrich Mohs
B) Pliny the Elder
C) Isaac Newton
D) Theophrastus

A) Logarithmic scale
B) Qualitative ordinal scale
C) Quantitative interval scale
D) Ratio scale

A) Aristotle
B) Pliny the Elder
C) Friedrich Mohs
D) Theophrastus

A) 1
B) 10
C) 5
D) 9

A) Yes, always
B) No
C) Only if they affect structural integrity
D) Only if they are deep

A) Barometer
B) Spectrometer
C) Sclerometer
D) Thermometer

A) 1812
B) 1900
C) 1777
D) 1877