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List the 4 signs of a CHEMICAL CHANGE. --- CHOOSE 4.

• Shape

• New substance

• Bubbles

• Color change

• Different temperature

Choose all of the signs of a PHYSICAL CHANGE. ----- CHOOSE 4.

• shape

• size

• color

• state of matter

• solubility (dissolving)

Is this true?

• Yes

• No

• Maybe

• Never

I live

Ferric

• Fe³⁺

• Fe⁴⁺

• Fe^3-

• Fe²⁺

Iodine

• I¹⁺

• Io^1-

• I^1-

• Io¹⁺

Chromate

• 2CrO^2-

• CrO^2-

• CrO₄^2-

• CrO₄^3-

Ferrous

• Fe^3-

• Fe^2-

• Fe³⁺

• Fe²⁺

Biphosphate

• H₂PO^2-

• HPO₄^2-

• 2HPO₂^2-

• HPO₂^3-

What is laughing gas ?

• Nitrous Oxide

• Carbon monoxide

• Sulphur dioxide

• Hydrogen peroxide