Identifying Physical vs Chemical Changes

The video tutorial from Moomoomath and Science explains the differences between physical and chemical changes. Physical changes involve alterations in physical properties like size, shape, and phase, without forming new substances. Chemical changes involve electron exchange, resulting in new substances, often indicated by color change, temperature change, or fizzing. The video provides examples of both types of changes, such as cutting, folding, and the reaction between sodium and water. It concludes with tips on identifying changes and encourages viewers to subscribe for more educational content.

What type of change does not alter the chemical composition of a substance?

• Biological change

• Physical change

• None of the above

• Chemical change

Which change is characterized by the creation of a new substance?

• Physical change

• Structural change

• State change

• Chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is a common indicator of a chemical change?

• Change in color

• Change in position

• Change in size

• Change in shape

Tags

NGSS.MS-PS1-2

Which example demonstrates a physical change?

• Melting of ice

• Cooking of food

• Rusting of iron

• Burning of wood

Tags

NGSS.MS-PS1-4

What happens when sodium is mixed with water?

• No reaction

• Phase change

• Physical change

• Chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is an indicator of a chemical change in the Mentos and Diet Coke experiment?

• Change in shape

• Separation of components

• Fizzing

• Change in volume

Tags

NGSS.MS-PS1-2

What rule of thumb can be used to identify a physical change in solutions?

• If it produces heat

• If it fizzes

• If it changes color

• If it can be separated

What physical change involves altering the size of metal?

• Dissolving

• Hammering

• Burning

• Melting

What does the teacher suggest about solutions in physical changes?

• They are permanent

• They always change color

• They cannot be separated

• They can be separated

What does the teacher encourage viewers to do at the end of the video?

• Ignore the lessons

• Subscribe and share

• Forget the content

• Watch without sound