5th Grade Science Mrs. LaRosa

Matter Study Guide

www.middleschoolscience.com 2008

• Anything that has a mass and a volume

Close up view of atoms and their behavior

Animated images are from http://www.chem.purdue.edu/gchelp/

• Changing from one state to another is a Physical Change.

• If a new substance is formed it is a Chemical Change.

Images are from http://www.chem4kids.com

•  The building blocks of Matter •  Consists of Protons (+), Electrons (-), and Neutrons (N).

•  Consists of only one kind of atom, •  Cannot be broken down into a simpler type of matter

by either physical or chemical means •  Can exist as either atoms or molecules.

Images are from http://www.chem4kids.com

•  A molecule consists of two or more atoms of the same element, or different elements, that are chemically bound together.

•  In the animation above, two nitrogen atoms (N + N = N2) make one Nitrogen molecule .

Animated images and notes from http://www.chem.purdue.edu/gchelp/atoms/elements.html

•  Atoms of two or more different elements bound together.

•  Can be separated into elements chemically,

but not physically.

In the animation above, water (H20) is a compound made of Hydrogen and Oxygen.

•  Solutions are groups of molecules that are mixed up in a completely even distribution.

•  Uniform Distribution. •  Example: Sugar and Water

Images are from http://www.chem4kids.com

•  The substance to be dissolved.

•  The one doing the dissolving.

Images are from http://www.chem4kids.com

•  Particle sizes are in between the size of particles found in solutions and suspensions .

•  Can be mixed and remain evenly distributed without settling out.

•  They are substances held together by physical forces, not chemical.

•  Can be separated physically.

•  Solutions are also mixtures.

•  The substances are not uniformly mixed.

•  Example: Sand in a glass of water. Images are from http://www.chem4kids.com

•  Are heterogeneous mixtures consisting of parts that are visible to the naked eye.

Example: the ingredients in salad dressing

•  Substances will settle over time.

Matter

Mixtures

Homogeneous

Solution

Solvent Solution

Colloids

Heterogeneous

Suspensions

Pure Substances

Element Molecule

Compounds