Matter www.middleschoolscience.com 2008

Matter Anything that has a mass and a volume

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

Molecules A molecule consists of two or more atoms of the same element, It is a Pure Substance…. In the animation above, two nitrogen atoms (N + N = N2) make one Nitrogen molecule .

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

States of Matter Solid Liquid Gas Close up view of atoms and their behavior Animated images are from http://www.chem.purdue.edu/gchelp/

http://preparatorychemistry.com/KMT_flash.ht m How could this change with shape, volume, viscosity in response to temperature change?

Solutions Solutions are groups of molecules that are mixed up in a completely even distribution. Images are from http://www.chem4kids.com

Solute Solvent The substance to be dissolved. The one doing the dissolving. Images are from http://www.chem4kids.com

Making a Solution

Mixtures They are substances held together by physical forces, not chemical. Can be separated physically. Solutions are also mixtures. Images are from http://www.chem4kids.com

Mixtures Suspensions mixtures consisting of parts that are visible to the naked eye. Substances will settle over time. Example: the ingredients in salad dressing

Mr. Lee’s Rap http://www.youtube.com/watch?v=B0d- fzj9oMQ&feature=related

Discussion Describe the movement of particles in a solid and the forces between them. Solid particles vibrate in place and they have strong attractive forces between the particles. How do particles move and interact in a gas? Gas particles move freely, spread out, and they have little attraction for other gas particles.

Challenge How is temperature related to particle motion? Temperature is directly related to particle motion. The higher the temperature, the more kinetic energy the particles have. The more kinetic energy particles have, the faster they move.

Make a web Use your own paper Follow the diagram outline Top box: Matter Word bank: compound, element, Matter, mixtures, molecule, pure substance, solution, solute, solvent, suspension

Matter Mixtures Pure Substances Solvent Solution Solute Suspensions Element Molecule Compounds