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Science Notes

Science notes for BC Science 7.

Monica Rosa

on 3 February 2011

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Transcript of Science Notes

Science Notes BC Science 7 Characteristics and Properties of Matter Everything that you can see, as well as touch, smell, taste, is made of matter. Chapter 4 Chapter 4.1 Words
Matter - Makes up every living thing and every material object
Chemistry - The study of matter and its changes
Quantitive Property - Any property of matter that you can measure or describe with numerical value
Qualitive Property - Any property that you can observe directly with your senses
States of matter - Solid, liquid and gas
Solid - A form of matter that has a fixed shape
Liquid - Fluid (flowing) form of matter
Gas - Fluid form of matter
Temperature - Measures how hot or cold matter is
Melting Point - The temperature at which a solid melts to become a liquid; also called the freezing point
Boiling Point - The temperature at which a liquid boils to become a gas Chapter 4.2 Words

Mass - Quantity of matter that makes up the object
Volume - Quantity of space that an object takes up
Density - The quantity of mass in a certain volume of material of property Chapter 4.3 Words

Physical Change - A change in which a material changes its shape or state but keeps its identity
Model - Anything that helps you understand, communicate, or test an idea
Particle Model Of Matter - Scientific description of many different features of matter
Chemical Change - One type of matter changes to produce one or more different types of matter
Chemical Property - Ability of a material to take part in a chemical change
Chapter 5 Classifying Matter Chapter 5.1 Words
Mixture - Contains two or more different types of matter
Heterogeneous - a mixture that is made up of different parts that you can
detect easily
Pure Substance -
Homogeneous - Every part of the material is the same as every other part

Chapter 5.2 Words
Mechanical Mixtures - Mixtures that are clearly heterogeneous
Suspension - A heterogeneous mixture in which the particles settle slowly after mixing
Solutions - Homogeneous mixtures
Alloys - Solutions that are made from 2 or more metals
Emulsion - A suspension that has been treated with an emulsifying agent
Dissolves - To mix a solute completely with a solvent to form a solution
Solute - The substance that dissolves
Solvent - The substance in which the solute dissolves
Chapter 5.3 Words

Element - A pure substance that cannot be broken down
or seperated into other pure substances
Compound - A substance that is made from two or more
elements that have combined in a chemical change
Periodic Table - A table in which the elements are arranged
into groups and periods according to their properties
Theory - An explanation scientists develop after completing
many experiments
Molecule - When two or more atoms link together
Chapter 5.4 Words

Raw Material - A material that must be processed to obtain useful products
Chapter 6 Exploring Solutions Chapter 6.1 Words

Soluble - Able to dissolve in a certain solvent
Insoluble - Unable to dissolve in a certain solvent
Concentrated Solution - A large mass of dissolved solute
for a certain quantity of solvent
Dilute Solution - A small mass of dissolved solute for a
certain quantity of solvent
Concentration - The quantity of solute that is dissolved
in a certain quantity of solvent Chapter 6.2 Words

Saturated Solution - Forms when no more solute will dissolve in a specific amount of solvent, even with plenty of stirring
Unsaturated Solution - A solution that is not yet saturate
Solubility - Refers to the mass of solute that can dissolve in a certain volume or mass of solvent, at a certain temperature
Rate of dissolving - When you measure how fast a solute dissolves Chapter 6.3 Words

Acid - A compound that dissolves in water to form a solution with properties
Base - A compound that dissolves in water to form a solution with properties
Indicator - A compound that turns one colour in an acid and a different
colour in a base
pH scale - Scientists describe the acidity of a solution using this
Neutral - What is not acidic and not basic Chapter 6.4 Words

Crystallization - The process of evaporating the solvent from a
solution, leaving the solute behind in crystal form
Distillation - A process used to seperate and collect the components
of a solution; the solvent is heated to change it into gas, then converted back to a liquid through condensation
Full transcript