science chemistry (words,defs+pics)

Photo Chemistry 7 Photo Chemistry 7

By: Kuba KalecinskiBy: Kuba Kalecinski

Miss. Wolfenden’s Grade 7 Miss. Wolfenden’s Grade 7 Science ClassScience Class

MatterMatter Anything that takes up Anything that takes up

space.space.

((The three states of matter The three states of matter are solid, liquid, and gasare solid, liquid, and gas.).)

Here I have an object, our school playground.

Non MatterNon Matter A chemical, a substance, A chemical, a substance,

or an object that has no or an object that has no mass.mass.

This is a picture of the sunshine. Not really clear, but still non matter.

Pure SubstancePure Substance An object or substance that is made up An object or substance that is made up

of one property. (For example, a of one property. (For example, a diamond)diamond)

ElementElement A pure substance that cannot be A pure substance that cannot be

broken into simpler substances. broken into simpler substances.

(There were first thought to be only 18 elements, but after many (There were first thought to be only 18 elements, but after many years of study, scientists found 36 elements. The 36 elements are: years of study, scientists found 36 elements. The 36 elements are: Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Sodium, Magnesium, Aluminum, Silicon, Oxygen, Fluorine, Neon, Sodium, Magnesium, Aluminum, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Potassium, Calcium, Phosphorus, Sulfur, Chlorine, Argon, Potassium, Calcium, Scandium, Titanium, Vanadium, Chromium, Manganese, Iron, Scandium, Titanium, Vanadium, Chromium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Gallium, Germanium, Arsenic, Cobalt, Nickel, Copper, Zinc, Gallium, Germanium, Arsenic, Selenium, Bromine, and Krypton, but there are many, many more Selenium, Bromine, and Krypton, but there are many, many more in the world of chemistry.)in the world of chemistry.)

CompoundsCompounds

A pure substance made up of two or A pure substance made up of two or more different chemical elementsmore different chemical elements

Salt. Look closely, and you’ll see it.

MixturesMixtures Substances held together by physical Substances held together by physical

forces.forces.

Soda

Heterogeneous MixturesHeterogeneous Mixtures

A mixture that does not haveA mixture that does not have composition and properties. composition and properties.

Saltwater

Homogenous MixturesHomogenous Mixtures A substance or material that has only A substance or material that has only

one type of compound or element. one type of compound or element.

Honey…

MassMass Measure of matter in an object.Measure of matter in an object.

A building representing MASS.

VolumeVolume Measures the size of an object using Measures the size of an object using

length measurements, in three length measurements, in three dimensions.dimensions.

Another building, representing VOLUME this time.

SuspensionSuspension

When particulates have a degree When particulates have a degree greater than 1000 nm, so it is visible greater than 1000 nm, so it is visible to a naked eye.to a naked eye.

Mud. I know, looks way worse than mud… Sorry about that…

EmulsionEmulsion When two or more liquids together When two or more liquids together

don’t mix that welldon’t mix that well

Milk. In a white cup…Sorry if you can’t see it.

Mechanical ChangeMechanical Change

A change that you cannot see.A change that you cannot see.

Reversible ChangeReversible Change

When something can turn back into When something can turn back into a original form.a original form.

Ice cream! It is a reversible change because it can be refreezed.

Non Reversible ChangeNon Reversible Change When something cannot turn back to When something cannot turn back to

its original form after it changed.its original form after it changed.

In that cup, there’s sugar. And it is in BOILING hot water, and will melt soon. It is a non reversible change because once it melts, it’s gone forever.

Physical ChangePhysical Change A change, where a substance A change, where a substance

changes from one physical state, to changes from one physical state, to another, but no other substances are another, but no other substances are formed.formed.1st Picture

2nd Picture

Pencil sharpener

Pencil

A broken pencil

Chemical ChangeChemical Change

A change where new substances are A change where new substances are formed. formed.

ReferencesReferences A reference is when you show where you got your information A reference is when you show where you got your information

from. Here are my source websites and other sources I used:from. Here are my source websites and other sources I used:

--http://http:// chemicool.com/definition/chemicool.com/definition/

-http://ask.com-http://ask.com

-Science 7 (Textbook)-Science 7 (Textbook)

-http://wikipedia.com-http://wikipedia.com

-answers.yahoo.com-answers.yahoo.com

http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/M/Mixtures.html http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/M/Mixtures.html

-answers.google.com-answers.google.com