Define a physical change and provide an example from the video.

A physical change alters the appearance of a substance but does not change its chemical composition. An example from the video is ice melting.

Explain the difference between mixing lemonade and baking a cake in terms of chemical and physical changes.

Mixing lemonade is a physical change because the ingredients remain separate. Baking a cake is a chemical change because new substances are formed.

Is water boiling a chemical or physical change? Explain your answer.

Boiling water is a physical change because it only changes the state of the water from liquid to gas (steam), but it is still H2O.

Describe the chemical change that occurs when wood burns in a campfire.

When wood burns, it undergoes combustion, reacting with oxygen to produce ash, smoke, heat, and light. The original wood is transformed into new substances.

Chemical Versus Physical Changes Lesson Plan for Grade 7th Grade

Lesson Preview

Learning Objective

I can differentiate between chemical and physical changes.

1
In physical changes, the appearance of a substance changes, but the substance itself does not change.
2
In chemical changes, the particles of substances rearrange to form a new substance, which can be indicated by a color change, release of smell or light, or release of gas.
3
Baking is an example of a chemical change, while melting is an example of a physical change.

Chemical Versus Physical Changes

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Learning Objective

Warm-Up Video

Key Concepts

Practice Questions

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