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

7th Grade•45 minutes•Interactions of matter

Learning Objective

I can differentiate between chemical and physical changes.

Key Concepts

In physical changes, the appearance of a substance changes, but the substance itself does not change.

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.

Baking is an example of a chemical change, while melting is an example of a physical change.

Practice Questions

This lesson includes 10 practice questions to reinforce learning.

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

2. What are some indicators that a chemical change has occurred?

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

...and 7 more questions

Educational Video

Physical & Chemical Changes | Examples & Indicators

MAD GARDEN Science

Learning Objective

Key Concepts

Practice Questions

Educational Video

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