Professor Hof Princo introduces the concepts of chemical and physical changes through various examples. The video covers how chemical changes create new substances, while physical changes do not alter the atomic structure. Examples include sifting flour, evaporating milk, and crushing eggshells. The video also explores changes through activities like stretching rubber bands, shuffling cards, and melting wax. The professor uses engaging demonstrations to clarify these scientific concepts.

Which type of change results in the formation of a new substance?

• Chemical change

• Neither

• Both

• Physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What type of change does not rearrange the atoms in a substance?

• Neither

• Physical change

• Chemical change

• Both

Tags

NGSS.MS-PS1-4

Is sifting flour a chemical or physical change?

• Neither

• Both

• Physical change

• Chemical change

When milk evaporates, what type of change is it?

• Both

• Neither

• Physical change

• Chemical change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What type of change occurs when you crush an eggshell?

• Physical change

• Neither

• Chemical change

• Both

Leaving an egg out for three weeks results in a stinky mold. What type of change is this?

• Physical change

• Both

• Neither

• Chemical change

Tags

NGSS.MS-PS1-2

Stretching a rubber band is an example of which type of change?

• Chemical change

• Physical change

• Both

• Neither

Is folding a card a chemical or physical change?

• Neither

• Physical change

• Chemical change

• Both

What type of change is melting wax?

• Physical change

• Both

• Neither

• Chemical change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Burning a wick is an example of which type of change?

• Chemical change

• Neither

• Physical change

• Both

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5