8th Graders:  Finish answering questions on Activity 87, Fatal Accidents, pg. E-64 on a spearate piece of  paper.  Find the questions on the SEPUP link to the right.  User name: rms21, pw: mgoldsmith
6th Graders: homework tonight:

part 1) Fill out page 1 of your Lab Report form (including Problem, Hypothesis, Materials and Procedures).  Remember, your Problem must be written as a question! 

part 2)  study for an easy vocab quiz (first of several on these words) tomorrow on the following words:

• Substance - any element, compound or other material. Pure substances are either elements or compounds.
• Element - substance that cannot be chemically broken down into simpler substances.   Contains only one type of atom. Ex: Oxygen (O), hydrogen (H), carbon (C).
• Compound - made up of 2 or more elements chemically combined which has different properties than its elements. Ex: water (H2O); carbon dioxide (CO2).
• Mixture - made up of 2 or more elements physically combined, in any ratio, can be physically separated by using the ingredients' properties.  "Physically combined"  means put in the same place at same time), and can be physically separated.   Ex: soda
• Corrosive - a substance that reacts with a solid material. Ex: sulfuric and other acids corrode metals like iron.
• Flammable - a substance that catches on fire when exposed to spark, flame or heat.
• Toxic - Poisonous if inhaled, ingested or absorbed through skin. "Ingested" means swallowed. "Absorbed" means soaked up.
• Properties - are characteristics of each substance, and we can use the properties of each substance to distinguish (tell the difference), between substances. Properties may be physical or chemical.
• Physical properties are characteristics that do not change whether the amount is very large or very small, such as color, hardness, state, density, flexibility, and conductivity.
• Chemical properties are the specific result of a test with another chemical. Ex: flammability, pH (is a substance acid, neutral or base?), reactivity with acid, unique color change in a chemical reaction, or production of a salt when an acid reacts with a metal.
• heterogeneous - a mixture in which you can see the different substances that make up the mixture.
• homogeneous - a mixture where you can not see that it is made up of different substances; all parts of the mixture look the same.
• Measurement - Every measurement has two parts: number (quantity) and unit (standard amount).
• Customary system units of length: inch, foot, yard, mile; 12 inches = 1 foot; 3 feet = 1 yard; 5,280 ft = 1 mile.
• Metric Units of length: m = Meter, basic metric unit of length (length = distance between 2 points). Other metric units of length include mm, cm, km.                    Magic number = 10.  Ex: 1m = 10 dcm or 100 cm  or 1,000 mm