Pure Substances and Mixtures

Which of these is an element?

• Salt (NaCl)

• Water (H20)

• Oxygen (O)

• Carbon Dioxide (CO2)

Tags

NGSS.HS-PS1-1

Which of these is a compound?

• Aluminium (Al)

• Carbon Dioxide (CO2)

• Nitrogen (N)

• Sand

Tags

NGSS.MS-PS1-1

Which of these is a mixture?

• Laundry Detergent

• Salt (NaCl)

• Oxygen (O)

• Fluorine (Fl)

Air is:

• An element

• A compound

• A mixture

• None of these

Which is smaller: a human cell or an atom?

• Human cell

• Atom

What is the common thing in an element, compound and mixture?

• They are all made up of atoms

• They are all made up of compounds

• They are all mixtures

Tags

NGSS.MS-PS1-1

What is the difference between O and H2O?

• There is no difference

• O is an element and H2O is a compound

Tags

NGSS.MS-PS1-1

Identify this image

• An element

• A compund

• A mixture

• None of these

Tags

NGSS.MS-PS1-1

Why are elements and compounds called pure substances?

• They are only made up of one particular kind of an atom

• They are made up of different type of atoms

• They are only made up of one type of atom or one type of molecule

• None of these

Tags

NGSS.MS-PS1-1