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science
chemistry
20
Science
9th Grade
04/20/2012

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Term

What is Matter

 

Definition
Anything that has mass or volume.
Term
Mass
Definition
Mass is the amount of matter in something.
Term
Volume
Definition
Volume is the amount of space that something takes up. this means that you and everything around you is matter.
Term
Chemical
Definition
Everything in the world that isn't energy is a chemical or is made up of chemicals. Matter that is made up of a paticular chemical or chemicals is called a substance. Our bodies are made of chemical substances: oxygen, carbon, hydrogen, nitrogen, and others.
Term
Substances
Definition
That of which a thing consists; physical matter or material form and substance. the actual matter of a thing, as opposed to the appearance or shadow;reality.



Term
Pure Subtances
Definition
A pure substance is made up of only one kind of particle. Each part of a pure substance has the same properties, because each pure substence is made4 up its own type of particle. Each different pure substance has a different type of particle. Some pure substances are gold, hydrogen, and sodium chloride.
Term
Mixture
Definition
A mixture is made up of two or more diffrernt types of particles mixed together onto one substance. Many mixtures are easy to identify- you can see the particles of the different substances in the mixture (for example, a pizza, a salad, or salt and pepper). But some mixtures look like there is only one type of particle because the particles of the different parts are so small they blend together (for example, soda pop, milk, milk, and apple juice).
Term
Compound
Definition
can be broken down into smaller parts using chemical reactions, an example of a compound is calcium carbonate, which is made up of calcium, carbon, and oxygen.
Term
Element
Definition
An element cannot be broken down into smaller parts, this is because compounds are made up of two or more element.
Term
Metals
Definition
Share these physical properties: lustre- how well the surface of a substance reflects light. Malleability- can be bent or hammered without breaking. Ductility- can be stretched into a wire without snapping. Good conductors- heat or an electical current moves through them easily. Solid at room temperature (except for mercury, which is a liquid). many metals are a silvery grey colour. Some are spft while others are hard.
Term
Non-metals
Definition
Do not share these properties. They are gases or brittle solids at room temperature ( except bromine, which is a liquid). They are dull (not lustrous), malleable, or ductile, and they are poor conductors. They come in many different colours. Some are flexible while others are brittle.
Term
How can you handle chemicals safely in the classroom.
Definition

-wear goggles to protect eyes.

 

-use caution around open flame.

 

-some chemicals can cause chemical burns if touched, avoid contact with them.

 

-some chemicals are poisonous, avoid touching or breathing them.never taste chemicals.

Term
what are physical properties
Definition
A physical property is a feature of matter you can determine without changing the type of matter that is.
Term
Types of physical properties
Definition

-state (solid, liquid or gas)

-melting, freezing, and boiling point

- conductivity-how well a substance lets heat or electrical current move through it

-density- how compact a substance is (calculated by dividing mass by volume)

-lustre- how well the surface of a substance reflects light

-solubility- how much of a substance dissolves in another substance

-texture-how the surface of a substance feels (rough, soft, or smooth

Term
what are chemical properties
Definition
A chemical property describes how a substance changes when it is exposed to another substance to produce something new
Term
how is the periodic table organized
Definition
the periodic table is a chart used to organized all the elements known today.
Term
what are chemical symbols?
Definition
each of the elements has a chemical symbol for its name. some chemical either have one or two letters
Term
what are HHPS
Definition
HHPS means Hazardous Household Products Symbol. symbols used for telling if its explosive, corrosive, flammmable or poison  
Term
what are molecules
Definition
a molecule is made up of two or more atoms that are joined togetherby a chemical bond
Term
what are chemical formulas
Definition
chemical formulas represent elements that exist as molecules and all compounds
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