Poetry proverbs about physical changes should explain whether they are physical changes or chemical changes.

Thousands of mountains are tempered,

If the fire burns accidentally.

I'm not afraid of fractures,

Leave white and green on the earth.

The first sentence is that physical changes are followed by chemical changes.

First, the changes in idioms and materials

1. ever-changing: the image expresses chemical changes (chemical changes).

What's done is done: the shape of the object has changed. (Physical changes)

3. Flowers are everywhere: molecules are constantly moving (physical changes).

4. Ash formation by wax torch: It involves the burning phenomenon (chemical change) of substances.

5. Dropping water into ice: solidification phenomenon (physical change) in state change.

6. Add fuel to the fire: add fuel to make it burn more fully (chemical change).

7. Iron pestle becomes needle: the shape of the object changes from big to small (physical change).

8. Many a mickle makes a mickle (physical change).

9. Real gold is not afraid of fire: it shows that the chemical properties of gold are stable.