Classification of Matter

Question 1

What is the definition of a mixture?

Answer 1

made of more than one type of particle.
(ex. granola bars, orange juice, tea, and soil.)

Question 2

What is the definition of a homogeneous mixture?

Answer 2

evenly mixed. (uniform composition.)

Question 3

What is the definition of a solution?

Answer 3

cannot be visually distinguisable.
(ex. apple juice and non-distilled water.)

Question 4

What is the definition of an alloy?

Answer 4

a mixture of metals.
(ex. bronze and stainless steel.)

Question 5

What is the definition of an heterogeneous mixture?

Answer 5

not evenly mixed. non-uniform composition.
(ex. salad, granola, oil and water.)

Question 6

What is the definition of an colloid?

Answer 6

particles that don’t settle.
(ex. milk, fog.)

Question 7

What is the definition of suspensions?

Answer 7

particles that settle over time.
(ex. orange juice with pulp)

Question 8

What is the definition of a mechanical mixture?

Answer 8

can visually distinguish the different substances.
(ex. cereal and caesar salad.)

Question 9

What is a physical change?

Answer 9

a physical change is when no new substance is formed; it is reversible.
(ex. cutting, tearing, grinding, change in state, dissolving, and molding.)

Question 10

What is a chemical change?

Answer 10

a chemical change is when a new substance is formed; it is irreversible.
(ex. burning, rusting, eating (saliva action on food.)