17 Magnetic ForceThe attraction or repulsion between two magnetic poles
18 Extra Credit: Build a Magnet Things You'll NeedIron nail, wire, wire cutters, Knife, Battery, Tape, Paper clips, Adult Supervision
19 Gravitational Force The force that pulls objects toward each other. Sorry I was attracted to you!The law of universal gravitation states that the force of gravity acts between all objects in the universe that have mass!
20 Two Factors Affect Gravity Mass: the more mass the greater the gravitational force.Distance: the greater the distance the less gravitational force.
25 Try it! * An empty soda can * Blown-up balloon * A head of hair 1. Place the can on its side on a flat smooth surface like a table or a smooth floor. 2. Rub the blown up balloon back and forth through your hair really fast. 3. Now the fun part - Hold the balloon close to the can without actually touching the can. The can will start to roll towards the balloon without you even touching it!Try This Too: While you've got the balloon out, tear up part of a tissue into tiny pieces about 1/4 inch (.5 cm) big. Rub the balloon in your hair again and bring it close to the tissue pieces. They will be attracted to the balloon and then jump away.* An empty soda can * Blown-up balloon * A head of hair
26 Home Learning Complete Lesson 1 Assess Your Understandings Review & Assessment #1 PageVocabulary Cards Lesson 1Extra Credit: Gizmo #10 2/12Extra Credit: Magnet 2/24Extra Credit: Gizmo #11 2/27Science in the News 2/27