7-112 Lesson 3 Reading Two: Which Properties Can I Use When?

According to the Mohs hardness scale which of the following substances is the hardest?

• Talc

• an iron nail

• glass

• Corundum

In which state(s) of matter can the Mohs hardness scale be used.

• solid

• liquid

• gas

• mixture

Properties of substances...

• are always the same.

• are always the same EXCEPT when scientists study super small amounts in nanoscience.

• can not be measured.

• do not exists.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

What two (2) statements are NOT true about the Mohs hardness scale?

• The softest substances have a lower number.

• The softest substances have a higher number.

• The lowest number is 1.

• The highest number is 5.

How could someone tell if a ring contained diamonds or cubic zirconium?

• Test its color.

• Test its length.

• Test its hardness.

• Test its weight.