Chapter 2, Lesson 1 Flashcards
Variables
Factors of elements on the experiment that effect the result.
Variables can be:
Controlled. Dependent, of independent.
Controlled Variables (cause)
Factors that are different (cause)
Only one independent variable per experiment:
Controlled Variable
What is the responding variable?
Dependent
Dependent variable
Something that might be affected by change in the independent variables.
What I Change
Independent Variable
What I Observe
Dependent Variable
What I Keep the Same
Controlled Variable
Matter
Anything that has mass and occupies space
Atom
The basic particle which all elements are made
Chemistry
The study of the properties of matter and how matter changes.
Chemical Bond`
The force that holds atoms together
Substance
A single kind of matter that is pure and has a specific set of properties.
Molecule
A neutral particle made of 2 or more atoms joined by covalent bonds.
Physical property
A characteristic of pure substance that can be observed without changing it into another substance
Compound
A pure substance made of two or more elements chemically combined.
Chemical formula
A combination of symbols that represents the elements made of two or more elements chemically combined
Element
A pure substance that cannot be broken down into other substances by chemical of physical means.
Chemical formula
A combination of symbols that represents the elements in a compound and their proportions.
Mixture
2 or more substances that are mixed together but not chemically combined.
Heterogeneous mixture
A mixture in which pure substances are unevenly distributed throughout the mixture.
Homogeneous mixture
A mixture on which substances are evenly distributed throughout the mixture.
Solution
A a well mixed mixture containing a solvent and at least one solute that has the same properties throughout.
