Scientific Method
The first step of the scientific method where you use your five senses?
What is an observation?
This is anything that has mass and volume.
What is matter?
What is a physical change?
An educated guess or reasonable explanation of observations.
What is a hypothesis?
Matter with a uniform and definite composition belongs to this category.
What is a pure substance?
Rusting and burning are examples of this type of change.
What is a chemical change?
This step of the scientific method is used to test hypotheses.
What is an experiment?
H2O and CO2 are examples of this type of pure substance.
What are compounds?
During a chemical change, these are formed.
What is a new substance or compound?
A hypothesis repeatedly supported by experimental evidence becomes this.
What is a theory?
A mixture in which parts can be physically seen and picked out.
What is a heterogeneous mixture?
In a chemical equation, substances you start with are called these.
What are reactants?
The variable of an experiment that the experimenter manipulates or changes.
What is a independent variable?
Sugar water, milk, and bronze are examples of this type of mixture.
What is a homogenous mixture?
According to this law, matter cannot be created or destroyed.
What is the Law of Conservation of Mass