Pure and Impure Substances

Which of the following of correct definitions of Pure Substance? (More than one answer)

• A substance made of two types of atoms

• A substance made of only one type of atom

• A substance made of only one type of compound

• A substance that will not poison you

Which of these is an example of a pure substance?

• Tap water

• Tap water

• Gold ore

• Distilled water

Which of the following is the correct definition of an impure substance?

• Something made from one type of atom and one type of compound

• Something made of more than one type of substance

• Something made of more than one type of substance not chemically bonded

• Something made of two types of atoms

Which of these are examples of impure substances? (More than one answer)

• Distilled water

• Gold ore

• Air

• Tap water

Pure or impure?

• Pure

• Impure

Tags

NGSS.MS-PS1-1

Pure or impure?

• Pure

• Impure

Tags

NGSS.MS-PS1-1

Which property is changed by adding impurities to a pure substance?

• Magnetism

• Melting and Boiling Point

• Colour

• Temperature

Why does grit prevent ice from forming on roads?

• Melts ice by transferring energy

• It doesn't

• Lowers the melting point of water, stopping it from freezing

• Raises the melting point of water, causing it to melt

Which of these graphs shows an impure substance?

• A

• B