Classification of Matter
What type of matter is Aluminum (Al) or Sodium (Na) an example of?
Element
True or False? In a physical change, a new substance forms.
False. That would be a chemical change.
How are solids particles arranged?
packed tightly
Which state of matter highest kinetic energy?
Gas
Define physical change
A change of a substance that can be observed or measured with out changing it's identity.
A mixture where one substance dissolves in another and the substances are mixed evenly is a _____________________.
Homogenous mixture
Explain what type of change rust formation is an example of and why.
Chemical because oxidation causes rust to form on the original metal substance.
Molecules that are far apart and in constant motion
Gas
Give 3 examples of physical changes between states of matter.
Answers will vary but should be examples of phase changes (melting, evaporating, ionizing, etc.)
Define chemical change
A change of a substance that can be observed or measured by changing it's identity.
Give three examples of heterogenous mixtures.
Salad, vegetable soup, lemonade with lemons, rocks, trail mix, etc.
Give three examples of physical properties.
Cutting, slicing, color, density, all phase changes.
Matter that has definite shape and definite volume
solid
What is added or taken away from matter to make it change phase or state?
Heat/Thermal energy
Define element.
A substance that cannot be separated into a simpler substance.
Give two examples of pure substances.
A list of elements or compounds
Give an example of a physical change and a chemical change that can occur when cooking a meal.
Answers will vary
What are two major differences between the particles of solids, liquids and gases? Label the energies in order of increasing energy.
Different particle arrangement (spacing, movement, etc.) Different amounts of energy.
Solid, liquid, gas
Define sublimation.
Define freezing.
Define melting.
Define vaporization.
Define condensation
Solid to gas
Liquid to solid
solid to liquid
liquid to gas
gas to liquid
Define compound
a substance that contains two or more elements.
What type of mixture is city air classified as and why?
Heterogenous mixture; because of pollutants mixed in with the pure air.
Name two signs of a chemical change happening.
Color change, odor/taste change, fizzing or bubbling, burning, change in composition, etc..
1. Matter that has a definite volume but an indefinite shape.
2. Matter that has a indefinite volume and an indefinite shape.
Liquid
gas
Dry ice turning into a gas in warm water is an example of what phase change?
Sublimation
Define heterogenous and homogeneous mixture.
Heterogeneous mixture is a mixture that is not evenly distributed.
Homogeneous mixture is a mixture that is evenly distributed.