Changes around us

which of the following are reversible change?

• Melting of ice

• baking of chapati

• Boiling of water

• Folding of paper.

• Melting of wax.

which of the following are IRREVERSIBLE change?

• Burning of paper

• Cooking of food

• Melting of ice

• baking chapati from Dough

• Rolling chapati from dough

Is water melting a physical or chemical change?

• Physical
• Chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Is a burning candle a physical or chemical change?

• Physical
• Chemical

Tags

NGSS.MS-PS1-2

Is salt dissolving in water a physical or chemical change?

• Physical
• Chemical

Tags

NGSS.MS-PS1-2

What is the meaning of Irreversible ?

• Something that can return to it's normal shape

• Something that can't return to it's normal shape

What is the meaning of Reversible ?

• Something that can't return ti it's normal shape

• Something that can return to it's normal shape

A chemical change

• doesn't really change much.
• creates a new substance
• is a change in the state of matter

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Melting chocolate is what type of change?

• Irreversible

• Reversible

Cooking an egg is what type of change?

• Irreversible

• Reversible