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If new substance is form it is a chemical change if new substance is not form it is a physical change.moosa raza

Example of physical change;

.physical change doesn't notchange like melting ice.

A physical change doesn’t make a new substance and can often be reversed, like melting ice. A chemical change creates new substances and is usually irreversible, like burning wood.

A physical change alters a substance's appearance or state without changing its composition, like when ice melts into water. It’s often reversible.

 

A chemical change creates new substances and is usually irreversible, like when wood burns to form ash, carbon dioxide, and water vapor.

 

BY: HASEEB 6 E

A physical change the form of a substance but not its chemical composition (like ice is melting in water).A chemical change creates a new substance with different properties (like burning wood into ash).

ANS1)A chemical change makes a new substance and is hard to reverse. A physical change only changes how something looks or feels.

ANS2): Physical change: Ice melting. Chemical change: Cake baking.

HASSAN AHMED

The clues that show that the change is physical as it does not change the color and does not create a new substance and it shows that it is chemical as it changes its texture and color and create a new substance.

 

Physical Change Examples: Water boiling,

Chemical Change Example : Rusting.

Physical changes alter the appearance or form of matter, while chemical changes result in the formation of new substances with different properties by M.ZAYAN ANIS

Signs of a chemical change:

.Color change

.Gas production (bubbles)

.Heat or light emission

 

.Change in state.

.Change in shape or size

.No new substances formed

Physical changes in matter are often reversible: An ice cube can melt into liquid water, and then the liquid water can be frozen back into an ice cube. Chemical changes, on the other hand, are not reversible: A log burned in a fire turns to ashes, but the ashes cannot be changed back into a log.

A physical change only changes how something looks, but it stays the same substance (like ice melting). A chemical change makes a new substance with signs like color change, bubbles, or heat (like bread toasting).

 

 

 

By:Daniyal Malik

What clues help you figure out if a change is chemical or physical?

 

Give one example of physical change and one example of chemical change.

P AND C PROPERTIES VIE