Physical and Chemical Changes

Front

A student mixes yellow powder with water. Which observation would prove a CHEMICAL change occurred? Options: The powder DISSOLVED in the water, The water turned the COLOR yellow, The bag's TEMPERATURE changed, The STATE OF MATTER changed

Back

The bag's TEMPERATURE changed

Front

Which of the following options provides evidence of a CHEMICAL change?

• Wood is burned releasing ash and smoke
• Rocks separate when soil is sifted
• Water turns to ice when you put it in the freezer
• Salt dissolves in water

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? Options: Physical change, Chemical change, No change

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