This document discusses the two types of changes that matter can undergo: physical and chemical changes. Physical changes alter the shape, size, color, or state of matter without changing its chemical composition, like freezing water to ice or bending plasticine. Chemical changes create new substances, such as combustion turning wood into smoke and ashes or oxidation transforming metal into rust. Cooking is also a chemical change that transforms ingredients into a new food.

1. SCIENCE-THIRD PRIMARY YEAR
CEIP CORTES DE ARAGÓN
(Teacher: Miguel Navarro)

3. - MATTER IS ANYTHING WE CAN SEE, TOUCH, TASTE OR
SMELL
- EVERYTHING IS MADE UP OF MATTER
- WE CAN DISTINGUISH 2 DIFFERENT TYPES OF MATTER
CHANGES:
- PHYSICAL CHANGES
- CHEMICAL CHANGES

4. 1.- PHYSICAL CHANGES1.- PHYSICAL CHANGES
- WHEN WE CHANGE SHAPE, SIZE, COLOUR OR STATE WEWHEN WE CHANGE SHAPE, SIZE, COLOUR OR STATE WE
ARE MAKING PHYSICAL CHANGES. EXAMPLES:ARE MAKING PHYSICAL CHANGES. EXAMPLES:
• CHANGE OF STATE:CHANGE OF STATE: WHEN WE CHANGE THE STATE OFWHEN WE CHANGE THE STATE OF
WATER FROM A LIQUID TO A SOLID BY FREEZING IT ANDWATER FROM A LIQUID TO A SOLID BY FREEZING IT AND
MAKING ICEMAKING ICE
• CHANGE OF SHAPE:CHANGE OF SHAPE: WHEN WE BEND, TWIST, PRESS ORWHEN WE BEND, TWIST, PRESS OR
STRETCH PLASTICINESTRETCH PLASTICINE

5. 2.- CHEMICAL CHANGES2.- CHEMICAL CHANGES
- IN A CHEMICAL CHANGE, THE MATTER CHANGES INTO
DIFFERENT MATTER
- COMBUSTION, OXIDATION AND COOKING ARE CHEMICAL
CHANGES
• COMBUSTION
- WHEN WE BURN WOOD OR PAPER THE MATERIALS
TRANSFORM INTO SMOKE AND ASHES

6. • OXIDATION
- THE METAL CHANGES INTO RUST
• COOKING
- WE TRANSFORM INGREDIENTS INTO A NEW FOOD

7. • OXIDATION
- THE METAL CHANGES INTO RUST
• COOKING
- WE TRANSFORM INGREDIENTS INTO A NEW FOOD