Scientific Method
An educated guess that answers your question
Hypothesis
the variable which is measured in experiment.
Written after the "then,________" in the hypothesis.
Dependent Variable
a process that does not change the chemical make-up in a substance. Ex. Breaking your pencil, freezing popsicles, slicing bread.
Physical Change
smallest part of an element that cannot be broken down by any chemical means
The order of the Energy Levels
2 8 8 2
This observations is when you use your senses to gather information about something, without numbers
Qualitative Observation
What causes the changes to be measured in an experiment. Written in the first part of the hypothesis after the "If___"
Independent Variable
A process that involves a change in the chemical make-up of the substance. After the change, it no longer has the same properties. Ex. Frying an egg, rusting, bread molding, etc.
Chemical change
The central most important part of an atom; most of the mass of an atom is found here
Nucleus
is a substance formed when two or more elements are joined together chemically
Compound
This type of observation is when you use your sense to gather information, they are numerical observations
Quantitative Observations
A judgment that tells whether the data does or does not support the hypothesis
The Conclusion
has a definite size (volume) and shape; particles are packed together tightly and movement is not fast
Solid
Parts of an atom that carries a positive electric charge; found in the nucleus
Protons
Mixture made up of two or more different substances, which are mixed but are not combined chemically; Ex. Cereal, milkshakes, salad dressings with oil.
Heterogeneous Mixture
Testing an idea or hypothesis through a controlled investigation.
Experiment
In an experiment, the variables which are kept the same.
Constants
has a definite size (volume) but no definite shape; particles are more active and farther apart than in a solid
Liquid
Parts of an atom that carry no charge; found in the nucleus
Neutrons
Mixture in which particles of one substance are spread evenly throughout the other substance. Ex. Tea,
Homogeneous Mixture
What are the 6 Steps of the Scientific Method?
Collect Information
Form a Hypothesis
Design an Experiment
Analysis
Conclusion
The group which does not receive the Independent Variable
Control Group
What are the 6 Phase Change of Matter?
Boiling
Evaporation
Condensation
Sublimation
Deposition
Freezing
Parts of an atom that carry a negative electric charge; found continually moving around the nucleus in the electron cloud
Electrons
Elements and Compounds are examples of these substances, where the have uniform composition
Pure Substance