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- 1. Multiple Choice
Which observation(s) might be used as evidence that a chemical reaction occurred?Color changeOdor changeProperties changeAll of the above - 2. Multiple Choice_________ is (are) made of more than one atom.A moleculeProtonsNeutronsAn element
- 3. Multiple Choice________ result(s) in no new substances.A physical changeA chemical changePhysical and chemical changesNone of the above
- 4. Multiple ChoiceWhich is an example of a physical change?Burning woodFreezing waterRust on a carCooking food
- 5. Multiple ChoiceWhich is an example of a chemical change?Burning woodRust on a carCooking foodAll of the above
- 6. Multiple ChoiceIf you start a chemical reaction with 5 atoms of helium, how many atoms will you have after?4 atoms10 atoms1 atom5 atoms
- 7. Multiple ChoiceWhich of the following are properties of matter?MagnetismColorOdorAll of the above
- 8. Multiple ChoiceWhich of the following help a chemical reaction to happen faster?MoleculeAtomCatalystDensity
- 9. Multiple ChoiceIs TNT exploding a physical or chemical change?PhysicalChemicalBoth physical and chemicalNeither physical nor chemical
- 10. Multiple ChoiceWhat kind of scientist forms new materials by studying chemical reactions?Chemical engineerMaterials scientistPharmacistMedical doctor
- Answer choicesTagsAnswer choicesTags