IC2 Lesson 3 Melting Point and Hardness

HARDNESS is the ability of minerals to resist being ____________. 

• melted

• scratched

• frozen

• burned

The amount of matter affects it's melting point.

• True

• False

Answer explanation

Although the large stick of butter will take longer to melt than the smaller piece,the temperature they start to melt at is the same.

Zinc can be scratched by iron. This means that zinc is _____ than iron on the Mohs hardness scale.

• softer

• harder

• smaller

• bigger

Tags

NGSS.MS-PS1-2

Which mineral can scratch a penny?

• Talc

• Calcite

• Gypsum

• Quartz

This ring is beautiful and has different sized diamonds. Which diamond(s) has the greatest hardness?

• The smaller diamonds around the sides.

• The largest one in the center

• They all have the same hardness

• Each diamond has its own hardness. More testing must be done.

Common objects such as your fingernail and a penny can be compared by their hardness.

• True

• False

Tags

NGSS.MS-PS1-2

Which mineral is softer than Apatite but harder than Calcite ?

• Talc

• Fluorite

• Orthoclase

• Gypsum

Soap and fat that are the same color will also have the same melting point.

• True

• False

• It depends on the amount.

Answer explanation

Color does not affect melting point.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

To determine the melting point you should record the temperature when

• the amount that you have is completely in the liquid state.

• you see smoke

• the substance starts to boil

• as soon as you see the solid become a liquid.

Tags

NGSS.MS-PS1-4

Gasses such as Oxygen have a melting point?

• True

• False

Answer explanation

If gasses are cooled they will become a liquid and eventually a solid. This means that when heat is added they will melt.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-1