Physical and Chemical Change

What defines a physical change in matter?

• Electrons are exchanged, creating a new substance.

• Matter changes forms but retains its chemical identity.

• A change in temperature or an explosion occurs.

• The substance undergoes a complete transformation into something new.

Which of the following is an indicator of a chemical change?

• A change in size or shape.

• Electrons are exchanged and a new substance is created.

• A change in the state of matter (e.g., solid to liquid).

• The substance is simply being cut or folded.

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

• Melting ice into water.

• Dissolving sugar in coffee.

• Forging metal into a different shape.

• Fireworks producing light, heat, and sound.

Which of these scenarios represents a physical change?

• A firework exploding in the sky.

• Cutting hair to change its length.

• Mixing cabbage juice with different substances, causing color changes.

• Sodium reacting with water, producing bubbles and heat.