Classifying Matter: Pure Substances vs. Mixtures

What is considered matter?

• Anything that is visible

• Anything that can be heard

• Anything that produces light

• Anything that has mass or takes up space

Tags

NGSS.5-PS1-1

NGSS.5-PS1-3

Which of the following is NOT considered matter?

• Light

• Water

• Salt

• Air

What is the smallest particle of an element?

• Atom

• Molecule

• Electron

• Compound

Which of the following is an example of a compound?

• Oxygen

• Sodium chloride

• Hydrogen

• Carbon

Tags

NGSS.MS-PS1-1

What does a chemical formula represent?

• The weight of an element

• The color of a compound

• The physical state of a substance

• The type and number of atoms in a molecule

Tags

NGSS.MS-PS1-1

What does the subscript in a chemical formula indicate?

• The phase of the substance

• The type of bond

• The temperature at which it reacts

• The number of atoms of the element

How are mixtures combined?

• Magnetically

• Electrically

• Physically

• Chemically

Which of the following is a homogenous mixture?

• Salad

• Sand and water

• Salt water

• Oil and water

What is a key difference between mixtures and pure substances?

• Pure substances are always liquids

• Mixtures require chemical reactions to separate

• Pure substances can be separated by physical means

• Mixtures can be separated by physical means

What method uses boiling points to separate mixtures?

• Condensation

• Distillation

• Filtration

• Evaporation