Physical Changes

What is a physical change?

• No new substance is formed
• Generally reversible using physical means
• Atoms can be rearranged but chemical composition remains the same
• Changes in size, volume or shape but the type of material remains the same

Examples of Physical Changes

• Aluminum foil is cut in half.
• Butter melts on warm toast.
• A juice box in the freezer freezes.
• mixing sand and water
• breaking a glass

Clues it is a chemical change and not physical change

• Makes a substance that wasn't there before.
• light, heat, color change, gas production, odor, or sound.
• It is a physical change only if starting and ending materials
• Even though they might LOOK different

Activity

• You will start at the station you are seated at now
• When you hear the timer you will have 2 minutes to clean up
• When you here the bell, rotate to the right
• At each station follow the directions and record data in your notebook
• Once we have competed all rotations, we will have a class debrief