Chemical or physical change?
Homogeneous vs heterogeneous
True or false
20

A new compound (product) results from a _______ change as the atoms rearrange themselves to form new chemical bonds.

Chemical or Physical?

Chemical 

20

_____________ are not uniform. If you take two samples from different parts of the mixture, they will not have an identical composition.

(Heterogeneous mixtures or Homogeneous mistakes?)

Heterogeneous Mixtures

20

True or false: Filtration is one of the most common physical procedures for separating a heterogeneous mixture.

True. 

25

Is burning wood a chemical or physical change?

Chemical

25

Chocolate chip cookies would be a __________ mixture.

Heterogeneous

25

True or false: Crystallization is one of the most used procedures for separating homogeneous mixtures

True

30

Is boiling water a chemical or physical change?

Physical

30

Salt and pepper form a _________ mixture.

Heterogeneous

35
Name 2 signs of a chemical change.
  • Gas is produced. In liquids, bubbles may form.
  • An odor is produced.
  • The substance changes color.
  • Sound is produced.
  • There is a temperature change. The surroundings become either hot or cold.
  • Light is produced.
  • A precipitate forms.
  • The change is difficult or possible to reverse.


35

Alcohol is a _____ mixture. 

Homogeneous. 

40

Is filling a balloon with hot air a chemical or physical change?

Physical Change
40

Milk is a _______ mixture. 

Homogeneous 

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