Pure Substances and Mixtures
The best place to check if a substance is an element
What is the Periodic Table?
Color and taste are examples of this kind of property
What is a physical property?
Phase changes represent this kind of change
What are physical changes?
This phase of matter has atoms that are the farthest apart from each other
What is a gas?
Information that we take in with our five senses
What are observations?
Pizza is an example of this type of mixture
What is a heterogeneous mixture?
This kind of property describes with how substances react with each other.
What is a chemical property?
The Statue of Liberty changing from copper to blue-green represents what kind of change
What is a chemical change?
Oxygen is in this phase at room temperature
What is a gas?
The step in the scientific method that must be testable, falsifiable, and usually in the form of an “If…then” statement
What is hypothesis?
This kind of mixture looks uniform and you cannot pick out different parts
What is a homogeneous mixture?
These properties can be observed without changing the chemical makeup of a substance
What is a physical property?
This kind of change can be represented by a chemical equation
What is a chemical change?
This term describes anything that mass and volume
What is matter?
What is feedback loop or feedback?
A combination of two or more chemically combined elements
What is a compound?
“Not flammable“ and “does not react with oil” are this kind of property for water
What are chemical properties?
The Law of Conservation of Matter
What is matter cannot be created or destroyed?
This phase of substance cannot be compressed and has a definite shape and volume
What is a solid?
A well-supported explanation of the natural world based on facts, hypotheses, and laws (how it works)
What is a theory?
Two or more pure substances physically mixed together with no fixed ratio
What is a mixture?
Melting point, freezing point, density
What are physical properties?
A substance is heated up on the stove until it starts boiling. A food dye is added so that it turns bright blue.
What are physical changes?
This phase of matter has a definite volume but an indefinite shape
What is a liquid?
This describes a natural phenomenon which has been tested over a long period of time under different conditions (what happens)
What is a law?