Phase Changes
What are the three states of matter?
Gas, Liquid, Solid
Define physical properties.
Physical properties are characteristics of a substance that can be observed without changing the subject
_____ are made up of atoms, but contain one type of matter.
- Element
What Substances are represented with chemical symbols?
- Element
The starting materials in a chemical reaction?
- Reactant
What is the phase change called when a solid converts to a liquid?
Melting
List 3 examples of chemical properties.
Flammability, heat of combustion, toxicity, Ph, ability to oxidize, radioactivity, reactivity with water, rusting.
_____ a substance made up of 2 or more elements.
- Compound
All ______ are molecules but not all molecules are ______?
The substance produced by a chemical reaction?
- Product
What is that phase change called when a gas converts to a solid?
Deposition
What is conductivity?
Materials ability to allow heat to flow.
Baking soda is an example of a ______
- Compound
______ Substance that can dissolve/form a homogeneous mixture.
- Solution
Formation of snow is an example of Endothermic or Exothermic?
-Exothermic
What 3 phase changes must have energy added?
Density over 1 will ___ in water.
Sink
Hydrogen is an example of a molecule, True OR False.
- False
To separate a mixture what is it called when you boil water to make freshwater?
- Distillation
- Melting ice cubes, Converting frost to water vapor, Evaporation of water, or Baking Bread.
A liquid has ___ Volume, and ___ Shape.
Definite, Indefinite
The ability of a solid to be hammered or shaped without shattering, is called what?
What is made up of different elements/compounds _____.
Strainers, Filters, are screens are examples of _____
- Filtration
What does chemical change do that physical change doesn't?
- Change into new substances.