Ticket out the door

What is the difference between physical change and chemical change

• Physical changes appearance

  Chemical changes the substance

• Physical changes the substance

  Chemical changes the appearance

• Physical changes happen because of a reaction

  Chemical changes just happen

• Physical changes are changes in state

  Chemical changes stay the same

True/False: Homogeneous mixtures are made from different substances in the same mixture?

True/False: The scientific notation for hundredth is 10^-2

True/False: Zeros are always significant?

How many sig figs does 3.7500 have?