Physical vs Chemical Properties and Changes

A scientist is examining an unknown solid. Which procedure would most likely help determine a chemical property of the substance?

• heating it to find the temperature at which it melts

• exposing it to a flame to see if it catches on fire

• hitting it with a hammer to determine if it breaks or bends

• placing it in water to find out whether or not it dissolves

Which characteristic of a substance is considered a chemical property?

• its boiling point

• its reactivity

• its density

• its conductivity

Which statement best describes chemical properties of matter?

• Chemical properties, such as density, must be observed when a substance is in its natural state at room temperature and normal atmospheric pressure.

• Chemical properties, such as reactivity, must be observed when a substance is in its natural state at room temperature and normal atmospheric pressure.

• Chemical properties, such as combustibility, are generally observed as the identity of a substance changes and one or more new substances form.

• Chemical properties, such as boiling point, are generally observed as the identity of a substance changes and one or more new substances form.

Which event always involves a chemical change?

• boiling

• melting

• conducting

• burning

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A change in a substance that only affects size, shape or state of matter.

• chemical change

• physical change

• chemical property

• endothermic

What kind of properties can only be observed when a substance changes into a different substance?

• physical properties

• chemical properties

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which type of property is the ability to conduct electricity?

• physical property

• chemical property

Properties that can be observed without changing the identity of the substance.

• Physical

• Chemical

A solid piece of chocolate is melted and changed to liquid form. Which property of the piece of chocolate will remain the same?

• Texture

• Temperature
  

• Shape

•  Mass

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Which of the following is NOT an example of a physical change?

• crumpled paper

• pencil sharpening

• shrunken clothing

• rust

Tags

NGSS.MS-PS1-2