Mixtures

Which of the following statements about pure substances is NOT true?

• A pure substance is a single type of matter.

• A pure substance can be easily separated physically.

• Pure substances have a specific makeup or composition.

• Pure substances can be elements or compounds.

Which of the following is NOT a pure substance?

• Water

• Air

• Salt

• Sugar

Which of the following is an example of a heterogeneous mixture?

• Soy sauce

• Lemonade

• Honey

• Trail Mix

Which of the following is an example of a homogeneous mixture?

• Chicken noodle soup

• Trail mix

• A smoothie

• Fruit salad

Katelyn is blending together ingredients to create different mixtures. Which combination of substances would most likely result in a homogeneous mixture?

• Sand and gravel

• Sand and salt

• Gravel and water

• Salt and water

Ocean water is a combination of salt and water. Which of the following best describes the composition of ocean water?

• It is an element, since water is found in all living things

• It is a pure substance, since particles can be found in ocean water

• It is a heterogeneous mixture, since it results from the combination of elements

• It is a solution, since it is made up of one substance dissolved in another

Which of the following mixtures can be separated using filtration? (remember the bell ringer DEMO)

• Sand and water

• Salt and water

• Alcohol and water

• Iron filings and sand

Which of the following mixtures can be separated using evaporation? (but NOT by filtration) (remember the bell ringer DEMO)

• Sand and water

• Salt and water

• Alcohol and water

• Iron filings and sand

Tags

NGSS.MS-PS1-4

Which of the following mixtures can be separated using magnetic attraction? (remember the bell ringer DEMO)

• Sand and water

• Salt and water

• Alcohol and water

• Iron filings and sand

Tags

NGSS.MS-PS2-5

Contains two or more different substances that are physically, not chemically, combined

• a mixture

• an element

• a compound

• a chemical formula