1. Happy Tuesday, Astronomers! Planner Check – Please turn to the hall pass section Today: Return Tests and Discuss Results Reteach and Revise LTs 1, 5, 6 HOMEWORK: Study for Revision Test of LTs 1, 5, and 6

2. We will revise LTs 1, 5 and 6 in class today AVERAGE SCORES LT1LT2LT3LT4LT5LT6 3.74.64.24.33.63.5 3.84.64.04.23.6 4.64.24.03.43.9 4.04.74.3 3.63.8 If you have other learning targets to revise 1. Review the material 2. Come in for extra help 3. Take a revision test for those learning targets.

3. LT1: I can define and explain how objects become electrically charged. 1.Rubbing: Direct contact between neutral objects Causes electrons on one of the objects to be physically moved to the other object. 2.Conduction: The transfer of electrons from a negatively charged object to a positively charged or neutral object by direct contact. Touching an already charged object and feeling a shock.

4. 3. Induction: Interaction between a charged object and a neutral object NO direct contact between objects The electric fields of the charged object attract the opposite charges in the neutral object (ONLY THE ELECTRONS MOVE) One side of the neutral object has more of one kind of charge This creates an attraction between the charged object and the neutral object The attraction can be between: A positively charged object and a neutral object A negatively charged object and a neutral object

5. LT5: I can identify different types of mechanical and electromagnetic waves and give examples of each. Mechanical waves: Require a medium to travel through – they travel through matter Can be longitudinal The particles move parallel to the direction of the waves Sound waves Can be transverse Waves on a rope The particles move at right angles to the direction of the wave

6. Electromagnetic waves All the different wavelengths of energy on the electromagnetic spectrum All are transverse waves – CAN TRAVEL THROUGH OUTER SPACE Wavelength decreases Frequency increases Energy increases

7. LT6: I can explain how waves interact with different materials and other waves. Waves can interaction with objects: Reflection: Bounce off an object Diffraction: bend around an object or move through a gap

8. Waves can interact with other materials: Refraction Waves slow down and bend when they go from one material to another

9. Waves can interact with other waves Interference Constructive interference Waves collide in-phase Create a larger wave than the originals Destructive interference Waves collide out of phase Create a smaller wave than the originals