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.