Scientific Method

Collect Facts and DataHypothesis

Test hypothesisModify hypothesis

Conclusion

Hypothesis

Tentative explanation of

the relationship between two or more variables that provide a

basis for further experimentation

Theory

Well established hypothesis…explains general phenomena…backed by facts…

explain natural phenomena…accepted by scientific community until disproven or

amended

Scientific laws

Simple statement of natural phenomena to which no exceptions

are known under the given condition.

Matter

Anything that has mass and takes up space

Substance

Matter with a definite fixed composition: pure substance.Substances are categorized as

elements or compounds.

Elements• Individual elements from the periodic table• Carbon• Oxygen• Nitrogen• Etc…

Compounds• Two or more elements• Water• Sodium chloride• Potassium carbonate

Mixture

• Material containing two or more substances• Heterogenous or homogeneous• Composition varies

Homogenous

• A solution• A mixture that is the same form and composition throughout

Heterogenous

• A mixture of two or more different substances

Solution

• Homogeneous mixture• Different from a pure substance• A mixture has two or more substances