Physical Change
1. A physical change is any change in size, shape, or state of matter.
2. In a physical change, ONLY the form changes, the kind of matter stays the same. The Chemical identity or makeup of the matter does not change.
3. When a physical change occurs, the substance can be put back into its original form.
Examples: Heating or cooling, phase change (melting, evaporating, etc), dissolving, size or shape change.
2. In a physical change, ONLY the form changes, the kind of matter stays the same. The Chemical identity or makeup of the matter does not change.
3. When a physical change occurs, the substance can be put back into its original form.
Examples: Heating or cooling, phase change (melting, evaporating, etc), dissolving, size or shape change.
Chemical Change
1. A chemical change is any change that changes the way elements are bonded. With a chemical change, a substance is formed and it has new properties.
2. When a chemical change takes place, a chemical reaction takes place.
Examples: Cooking, color change, rusting, burning, heat produced, gas produced, new smell produced, light produced.
FYI: Sour milk smells bad because bacteria have formed new substances in the milk!
2. When a chemical change takes place, a chemical reaction takes place.
Examples: Cooking, color change, rusting, burning, heat produced, gas produced, new smell produced, light produced.
FYI: Sour milk smells bad because bacteria have formed new substances in the milk!