Sci 2 Flashcards
What is the basic unit of matter?
Atom
What is a pure substance?
A substance that is made up of only one type of particle.
Is water a pure substance?
Yes
What is a mixture?
A combination of two or more substances that are not chemically combined.
What is a homogeneous mixture?
A mixture that has uniform composition and properties throughout.
What is a heterogeneous mixture?
A mixture that does not have uniform composition and properties throughout.
Is air a homogeneous mixture?
Yes
Is sand and water a heterogeneous mixture?
Yes
What is a solution?
A homogeneous mixture of two or more substances.
What is a solute?
The substance that is dissolved in a solution.
What is a solvent?
The substance in which the solute is dissolved in a solution.
What is a suspension?
A heterogeneous mixture in which solute particles do not dissolve but remain suspended in the medium.
What is a colloid?
A homogeneous mixture in which solute particles do not settle down.
What is a physical change?
A change in which the form of matter changes but its chemical composition remains the same.
What is a chemical change?
A change in which one or more substances are converted into new substances with different properties.
Is boiling of water a physical change or a chemical change?
Physical change
Is rusting of iron a physical change or a chemical change?
Chemical change
What is distillation?
A process of separating the components of a liquid mixture by heating and cooling.
What is chromatography?
A technique used to separate the components of a mixture based on their different affinities towards a stationary phase.
What is sublimation?
The process of changing a solid directly into a gas without passing through the liquid state.
What is crystallization?
The process of formation of crystals from a saturated solution.
What is evaporation?
The process of changing a liquid into vapor at a temperature below its boiling point.
What is filtration?
A technique used to separate an insoluble solid from a liquid by passing the mixture through a filter.
What is a pure substance made up of?
Only one type of particles
