Chemical vs Physical Changes

Chemical vs Physical Changes

Open Ended

In YOUR words, what is a chemical reaction? I want to know what YOU think, not google! There is no wrong answer - its what YOU think.

What is a chemical Reaction?

First, you need to know the difference between a CHEMICAL CHANGE and a PHYSICAL Change?

Physical Change

• a change in the physical properties, not the chemical

• change in size, shape, melting, freezing

• Example: ice melts or water freezes

• Example: cutting a paper into smaller pieces

Chemical Change

• Changes the CHEMICAL substance itself

• One chemical substance is changed into one or more different substances

• A chemical change results in new chemical formulas

• Example, hydrogen gas reacts with oxygen gas to form water

Multiple Choice

Is bending copper wire a physical or chemical change?

• Physical

• Chemical

Multiple Choice

Is a car using fuel a physical or chemical change?

• Physical
• Chemical

Multiple Choice

Is melting iron a physical or chemical change?

• Physical
• Chemical

Multiple Choice

Is a burning candle a physical or chemical change?

• Physical
• Chemical

Multiple Choice

Is digesting your food a physical or chemical change?

• Physical
• Chemical

Multiple Choice

Is salt dissolving in water a physical or chemical change?

• Physical
• Chemical

Multiple Choice

Is water melting a physical or chemical change?

• Physical

• Chemical

Chemical changes are Chemical Reactions

Chemical reactions happen everywhere