pH and Chemical Changes

An object undergoes a chemical change when it:

• changes shape, changes form, changes phase

• melts, changes odor, changes size

• changes color, burns, rusts

Physical or Chemical Change?  Logs burning in a campfire.

• Physical Change
• Chemical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Physical or Chemical Change?  Baking a cake.

• Chemical Change
• Physical Change

Tags

NGSS.MS-LS1-7

NGSS.MS-PS1-2

a substance formed when two or more elements are chemically bonded together

• Element Soup
• Pure Element
• Ion
• Compound

Tags

NGSS.MS-PS1-1

tells us the number of atoms of each element in a compound

• Coeffecient
• Exponent
• Chemical Formula
• Calculator

Tags

NGSS.MS-PS1-1

Is a rusting bicycle a chemical or physical change?

• chemcial
• physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A change in which NEW substances are formed.

• Chemical change
• Physical change
• Casual change
• Formal change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?

• double replacement 
• decomposition 
• combustion 
• single replacement

Tags

NGSS.MS-PS1-2

Bubbles form when two or more substances are combined ...

• Chemical Change
• Physical Change

Tags

NGSS.MS-PS1-2

The pH scale is a range from:

• 1-7
• 0-14
• 1-5
• 1-20