Exploring Physical and Chemical Changes

What type of change does a green leaf turning brown represent?

• Physical change

• Biological change

• Chemical change

• No change

Can a chemical change be easily reversed?

• Yes, always

• No, it's usually irreversible

• Yes, if heated

• Only in special conditions

What remains unchanged in a physical change?

• None of the above

• Both A and B

• Physical appearance

• Chemical properties

Which of the following is an example of a physical change?

• Cooking of rice

• Rusting of iron

• Burning of wood

• Melting of ice

Which process is an example of a physical change?

• Ripening of fruits

• Curdling of milk

• Cooking of rice

• Freezing of water

Can the change from ice back to water be reversed?

• Yes, by cooling

• No, it's permanent

• No, it's a chemical change

• Yes, by heating

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

What happens to wood when it burns?

• It evaporates

• It turns to ash

• It disintegrates

• It melts

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is the formation of ash from wood a reversible change?

• No

• Yes

• Only under pressure

• Only with chemicals

Tags

NGSS.MS-PS1-5

Which of the following is a chemical change?

• Bending a wire

• Breaking a glass

• Burning paper

• Chopping wood

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What defines a chemical change?

• Temporary change

• Reversible change

• Formation of a new substance

• Change in physical state

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5