Classification of Matter
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What is the definition of a mixture?
made of more than one type of particle. (ex. granola bars, orange juice, tea, and soil.)
What is the definition of a homogeneous mixture?
evenly mixed. (uniform composition.)
What is the definition of a solution?
cannot be visually distinguisable. (ex. apple juice and non-distilled water.)
What is the definition of an alloy?
a mixture of metals. (ex. bronze and stainless steel.)
What is the definition of an heterogeneous mixture?
not evenly mixed. non-uniform composition. (ex. salad, granola, oil and water.)
What is the definition of an colloid?
particles that don’t settle. (ex. milk, fog.)
What is the definition of suspensions?
particles that settle over time. (ex. orange juice with pulp)
What is the definition of a mechanical mixture?
can visually distinguish the different substances. (ex. cereal and caesar salad.)
What is a physical change?
a physical change is when no new substance is formed; it is reversible. (ex. cutting, tearing, grinding, change in state, dissolving, and molding.)
What is a chemical change?
a chemical change is when a new substance is formed; it is irreversible. (ex. burning, rusting, eating (saliva action on food.)