PHASE CHANGES
This phase change occurs when a solid turns directly into a gas.
What is sublimation?
This specific property is the temperature at which a solid becomes a liquid.
What is melting point?
This pure substance is made of only one type of atom.
What is an element?
This type of mixture has a uniform composition throughout.
What is homogeneous?
This method uses a magnet to separate components.
What is magnetic separation?
During this phase change, the temperature remains constant while energy is absorbed.
What is melting or vaporization?
A substance that melts over a temperature range rather than at one temperature is probably this.
What is a mixture?
Water (H₂O) is an example of this type of pure substance.
What is a compound?
Salad and granite are examples of this type of mixture.
What is heterogeneous?
Pouring a liquid off the top after solids have settled to the bottom.
What is decantation?
Frost forming on a window is an example of this phase change.
What is deposition?
This is why the temperature stays constant during boiling.
What is "energy is being used for the phase change instead of raising temperature"?
The main difference between a compound and a mixture.
What is "compounds are chemically bonded, mixtures are physically combined"?
The method you would use to separate salt from seawater.
What is evaporation or distillation?
This method separates liquids based on their different boiling points.
What is distillation?
This is why water droplets form on the outside of a cold glass.
What is condensation?
These two specific properties can be used to identify unknown pure substances.
What are melting point and boiling point?
This characteristic allows you to distinguish a pure substance from a mixture.
What is "pure substances have sharp, constant melting points"?
Steel is an example of this type of homogeneous mixture.
What is an alloy or solid solution?
The property that filtration uses to separate mixtures.
What is particle size?
The two phase changes occurring when popcorn pops.
What are vaporization and expansion?
If Substance A melts at 85°C and Substance B melts at 120°C, this one has stronger intermolecular forces.
What is Substance B?
Gold, oxygen gas, and distilled water all have this in common.
What are pure substances?
This is why mixtures don't have specific melting points like pure substances do.
What is "their composition can vary"?
The correct order of these methods to separate sand, salt, and iron filings: distillation, filtration, magnetic separation.
What is magnetic separation, then filtration, then distillation?