States of Matter
Form of matter with definite shape and volume.
What is a solid?
Matter consisting of one type of element or compound.
What is a pure substance?
A piece of paper gets cut by a pair of scissors. This is an example of a _____________ change.
What is physical?
The density of a substance _____________ as the temperature increases.
What is decreases?
The change of state from a solid to a liquid when a substance is heated.
What is melting?
Sugar dissolved in water is an example of this type of mixture.
What is a homogenous mixture?
This is a sign of a chemical change in a reaction.
What is:
1. transfer of energy
2. color change
3. production of gas
4. formation of a precipitate
The technique you would use to separate a homogeneous mixture of 2 or more liquids.
What is distillation?
Form of matter with indefinite shape and indefinite volume.
What is a gas?
This is a physical property used to identify a specific substance.
What is the density or the melting/boiling point?
A student crumples up a piece of paper and shoots it at the trash can. He misses the trash can and the paper accidentally lands on a hot plate in lab and burns to ashes. The crumpled paper is a ____________ change, and the burned paper is a ___________ change.
What is physical and chemical?
The horizontal segments on a heating curve graph represent:
What is the change in state of matter (phase change)?
The form of matter that contains positively charged ions and free electrons.
What is plasma?
Milk is an example of this type of mixture (be specific).
What is a colloid?
When two clear liquids are mixed, a layer of yellow chunks are created and sink to the bottom of the flask. These chunks are called a ____________, and it is an example of a _________ change.
What is precipitate and chemical?
The change in state of matter from gas to solid.
What is deposition?
The only state of matter where the particles can be compressed.
What is a gas?
What is vapor?
In lab, you measure that the tap water boils at 102 oC but you know water usually boils at 100 oC. This is caused by:
What is the presence of an impurity?
Explain the difference between the separation techniques of evaporation and crystallization.
What is:
evaporation - you heat up the liquid until it all evaporates and you are left behind with the soluble solid.
crystallization - you heat up the solution and cool it down before the liquid evaporates, the impurities will crystallize and fall out of solution