Exploring Physical and Chemical Changes

What is viscosity?

• The density of a material

• The ability of a material to conduct electricity

• The temperature at which a material melts

• The resistance of a material to flow

How can you decrease the viscosity of honey?

• Add water

• Cool it down

• Heat it up

• Stir it vigorously

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the formula for calculating density?

• Density = Volume / Mass

• Density = Mass x Volume

• Density = Mass / Volume

• Density = Mass + Volume

Which of the following is an example of a conductor?

• Metal

• Plastic

• Wood

• Rubber

What is malleability?

• The ability of a material to conduct heat

• The ability of a material to be hammered without shattering

• The ability of a material to dissolve in a solvent

• The ability of a material to resist scratching

What is a physical change?

• A change that affects the physical properties but not the composition

• A change that creates a new substance

• A change that is always reversible

• A change that alters the composition of a material

Tags

NGSS.MS-PS1-4

Which of the following is an example of a physical change?

• Burning wood

• Rusting iron

• Melting ice

• Baking a cake

Tags

NGSS.MS-PS1-4

What is one piece of evidence for a chemical change?

• Change in size

• Change in state

• Change in color

• Change in shape

Tags

NGSS.MS-PS1-2

What is flammability?

• The ability of a material to dissolve in water

• The ability of a material to conduct electricity

• The ability of a material to burn in the presence of oxygen

• The ability of a material to resist scratching

What does high reactivity mean for a substance?

• It will not combine easily with other substances

• It will resist changes in temperature

• It will combine easily with other substances

• It will dissolve easily in water

Tags

NGSS.HS-PS1-5