Physical and Chemical Changes

Front

A student mixes yellow powder with water. Which observation would prove a CHEMICAL change occurred?

Back

The bag's TEMPERATURE changed

Front

Evidence of a CHEMICAL change?

Back

Wood is burned releasing ash and smoke

Front

Which of the following examples provides evidence of a PHYSICAL change?

• Wood is burned and releases ash and smoke
• Iron rusts over time
• When mixed, baking soda and vinegar form gas bubbles
• A piece of paper changes shape when you rip it up

Back

A piece of paper changes shape when you rip it up

Front

A white tablet is dropped into water. The water becomes cloudy and bubbles are produced. What type of change has occurred?

Back

Chemical change

Front

Which observations prove a chemical change has occurred?

Back

Unexpected color change and temperature change

Front

What occurs when mixing milk and vinegar?

Back

Chemical change: production of a solid

Front

When iron is exposed to air over a long period of time, it forms rust. This is an example of what?

Back

A new substance forming

Front

What is a physical change?

Back

Changes the physical properties of an object, but does not create a new substance.

Front

What is a chemical change?

Back

Creates a new substance and cannot be undone.

Front

Is this an example of a physical or chemical change?

Back

Chemical