Physical and Chemical Properties & Changes Homework Debrief Tahoma Jr. High 8 th Grade Science Maple Valley, WA.

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Physical and Chemical Properties & Changes Homework Debrief Tahoma Jr. High 8 th Grade Science Maple Valley, WA

color smell temperature density attract/repel magnets size viscosity (thickness) melting/boiling point temperatures pH (acid or base?) reactivity with water? ignite into flame? Radioactive?

It looks different doing something that creates new chemical(s) Energy was released/absorbed (heat, light usually) – a new chemical was created with different properties Physical Change only changes how it looks Chemical Change creates NEW chemicals

C (first) P C C C P C red dust is new chemical (not metal of the bike) various answers oxygen in peroxide turns liver into something else still parts of the plant (and may even grow) a new chemical (dangerous too) is created energy used to create new chemicals energy released and new chemicals created if water is boiled away, sugar remains

T T F T various answers end show Remember – basically: PHYSICAL does NOT create new chemicals CHEMICAL creates new chemicals PROPERTIES is how you IDENTIFY something CHANGE is what happens to something