6 - Unit 1, Section 4 - Day 1

Physical and Chemical Changes

Unit 1, Section 4

Categorize

Options (8)

The Color of A Ball

The Ability of Iron to Rust

The Mass of An Apple

The Shape of A Pencil

The Flammability of Paper

The Reaction of Vinegar With Baking Soda

The Volume of A Bathtub

The Height of A Person

Categorize each of the following properties as a physical property or a chemical property.

Physical Properties

Chemical Properties

Physical Change - a change to a material's physical properties that does not change the identity of the material

• The material isn't changed, only its physical state

Physical Changes

State Change - A common type of physical change

• A material changes its state to:

  • A solid

  • A liquid

  • A gas
    

Changes of State

Common Changes of State

​From...	​To...	​Name
​Solid	Liquid​	Melting​
Liquid​	Solid​	Freezing​
Liquid​	Gas​	​Boiling (Vaporizing)
​Gas	Liquid​	Condensing​
​Solid	Gas​	Sublimating​
​Gas	Solid​	Depositing​

Chemical Change - a change in the identity of a substance due to the properties of that substance

• It is also called a chemical reaction

Chemical Changes

• Reactant - A starting material in a chemical reaction

  • It's like an "ingredient"

• Product - An ending material in a chemical reaction

  • Reactants form products

The language of chemical reactions

Multiple Choice

Which change of state occurs when a solid turns into a liquid?

• Melting

• Freezing

• Boiling

• Condensing

Multiple Choice

Which change of state occurs when a gas turns into a liquid?

• Melting

• Freezing

• Boiling

• Condensing

Multiple Choice

Moth balls change directly from a solid to a gas. This change of state is:

• Melting.

• Subliming.

• Depositing.

• Freezing.