Exploring Physical and Chemical Changes

The video explores the differences between chemical and physical changes. Physical changes alter the appearance but not the substance, such as melting ice or crumpling paper. Chemical changes result in new substances, indicated by color change, gas release, or heat. Examples include burning wood and rusting metal. The video also discusses everyday examples like making lemonade and baking, illustrating these concepts.

What is the main difference between chemical and physical changes?

• Both chemical and physical changes create new substances.

• Neither chemical nor physical changes create new substances.

• Physical changes alter the appearance, while chemical changes create new substances.

• Chemical changes alter the appearance, while physical changes create new substances.

Which of the following is an example of a physical change?

• Melting ice

• Baking a cake

• Rusting of iron

• Burning wood

Tags

NGSS.MS-PS1-4

What happens to the marshmallow, chocolate, and graham cracker when you take a bite of a s'more?

• They release gas.

• They change color.

• They remain the same substances but in smaller pieces.

• They form a new substance.

Which of the following is NOT an indicator of a chemical change?

• Release of heat

• Change in state

• Release of gas

• Color change

Tags

NGSS.MS-PS1-2

What evidence of a chemical change can be observed when wood burns?

• The wood changes shape.

• The wood melts.

• The wood absorbs heat.

• The wood changes color and releases gas.

Tags

NGSS.MS-PS1-2

What happens to the ingredients in cake batter when it is baked?

• They undergo a physical change.

• They remain the same.

• They separate back into their original forms.

• They undergo a chemical change.

Tags

NGSS.MS-PS1-2

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What causes rust to form on a nail?

• Exposure to light

• Exposure to heat

• Exposure to sugar

• Exposure to air and moisture

What type of change is boiling water?

• Both chemical and physical change

• Physical change

• Chemical change

• Neither chemical nor physical change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What happens to the water, sugar, and lemon juice in lemonade over time?

• They remain mixed permanently.

• They form a new substance.

• They change color.

• They separate back into their original forms.

Tags

NGSS.MS-PS1-2

What should you do if you want to learn more about science?

• Watch the next video.

• Ignore the video.

• Read a book.

• Ask a friend.

Tags

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