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1. motion

1.1. gravity

1.2. acceleration

1.3. force

2. atoms

2.1. oxygen

2.2. water

2.3. nitrogen

3. waves

4. matter

5. phys chem

5.1. physical change is a change that affect one or more physical properties of a substance

5.2. chemical change occurs when one or more substances change into entirely new substances with different properties.

5.2.1. for example- int he campfire, the dry, dense wood became the powdery ashes-new substances with different properties