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Matter Can Change- LECTURE - SERENA
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How has this clay been changed?
A: It was rolled, pressed, or shaped — but it's still clay.
What happens when you toast bread?
A: It becomes a new color and taste — that’s a chemical change!
ANSWER:
It changes shape but stays the same thing — that’s a physical change.
âť“Questions for You
What happens if you cut a piece of fabric?
🍳 If you cook an egg, the egg becomes hard and white.
That’s a new form! (Chemical change)
🧊 If ice melts, it becomes water.
It’s still made of water. (Physical change)
🍎 If you bite an apple, it’s still an apple
– just in pieces. (Physical change)
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Other Examples:
You are not turning clay into something else
you’re just making a new shape!
It still stays clay
— this is a physical change.
🧱 Shaping Clay
You can squeeze, roll, cut, or shape clay into different forms.
This is called a chemical change
— the material changes into something different.
🔥 Example:
If you burn wood or paper, it turns into ash and smoke. That is a new kind of matter.
Sometimes,
matter changes into something new.
🔥 Changing Matter
into Something New
This kind of change is called a physical change
— it changes the shape or size, but not what it’s made of.
✂️ If you cut paper, the shape changes,
but it’s still paper.
🧾 Example:
If you fold a piece of paper, it’s still paper.
These changes make them look different,
but they are still the same thing.
🔍 How Can You Change Matter?
You can bend, fold, tear, or cut some things.
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