Chapter 1.2

 Skim pages  Write all the bold words and their definitions in your notebook.

 Weight: measure of the force of gravity on you  Depends on gravity!

 Mass: amount of matter in the object  Mass does not change with location!  Mass is a physical property

 International System of Units  Unit for mass is the kilogram (kg)  1,000 grams = 1 kilogram  kilograms = 1 gram

 Use the balance to find the mass of the objects in the bag + one of your choosing  Record the objects and their mass in an organized table

 Volume: amount of space that matter occupies  Solids, Liquids and Gases Balloons

 Liter (L), milliliter (mL), cubic centimeter (cm 3 )  1 cm 3 = 1mL  Liquids are measured with a Graduated Cylinder

 Rectangular Objects Volume = Length x Width x Height V=(L)x(W)x(H) Length is 20 cm, height is 9.5 cm and width is 5.7 cm, what is the volume?

 V = (20cm)(9.5cm)(5.7cm)  (cm)(cm)(cm) = cm 3  V = 1,083cm 3

 How can you find the volume of irregular objects?  Write an explanation  Hint: Submersion

 Using the graduated cylinder, calculate the volume of each item in the bag  Record your data in an organized table, make a column for the item, the volume, the mass, and the density

 Density: Measurement of how much mass of a substance is contained in a given volume  Units are g/cm 3

 Density of water at room temperature is 1g/cm 3  Float < 1g/cm 3 < Sink

 Density(D) = Mass(M)/Volume(V) D=M/V A block has the mass of 200g and the volume of 250 cm3, what is the density of this block? Can the block float?

 What you do not finish is homework  Test Thursday

 Physical Change: Alters form or appearance but does not make any substance into a different substance  Chemical Change: A change in matter that produces one or more new substances

 A substance that undergoes a physical change is still the same substance after the change

 Changing state of matter  Dissolving  Bending  Crushing  Stretching  Breaking

 Produces a new substance with properties different from those of the orginal substance

 Burning natural gas  Combustion  Electrolysis  Oxidation  Tarnishing

 Use observation  Do you think a new substance is formed?  If so, provide evidence

 Matter is not created or destroyed in any physical or chemical change!  Burning a candle  Atoms are not lost or gained, only rearranged

 Energy: Ability to do work, or cause change

 Temperature: average energy of random motion of all particles in a substance  Cold = Slow  Hot = Fast

 Total energy of all particles in the object  Flows from warmer matter to cooler matter

 Endothermic: takes in energy  Exothermic: Releases energy

 Page all parts

 Kinetic  Potential  Chemical  Electromagnetic  Electrical  Thermal

 Energy of matter in motion Anything that is moving has kinetic energy

 Energy an object has because of it’s position

 Internal energy stored in chemical bonds  Chalk and Vinager

 Travels through space as waves Visible light Inferred UV Radio waves Gamma rays Microwave  Cell phones

 Electrical charged particles moving from one place to another  Electrolysis  Batteries Electrodes

 Burning a candle  Pushing a bike up a hill  Photosynthesis