10/14 & 10/15 - 7th Grade Agenda Payday Collect: HW: p.41- 44 Mirrors & Eye Measuring Liquid Volume Lab Class Reading: p. 60- 64 HW: Workbook: p. 45- 48
Reflection Reflection occurs when an object or wave bou_____ back off a surface through which it cannot pass. nce
Concave Mirror
Convex Mirror
Refraction Bending of light waves due to change in spe____ is known as refraction ed
Why does this pencil appear broken? Because light slowed down as it entered the glass as water
Convex Lenses
Concave Lenses produces smaller image
Parts of the Eye
Nearsightedness
Farsightedness
Graduated Cylinder When measuring liquids in a graduated cylinder, the measurement should be taken at the bottom of the curve called the meniscus
How much liquid is in this graduated cylinder? 52.8 ml 54 53 52 51
How much liquid is in this graduated cylinder? 6.62 ml 7 6.8 6.6 6.4 6.2
How much liquid is in this graduated cylinder? 11.5 ml 14 13 12 11
What is the correct way to read a graduated cylinder? B C Why?
Is this a right way to take measurement from a graduated cylinder? Why
Measuring Liquid Volume Lab
Galileo’s Telescope He was the first man to observe the moons of Jupiter and craters on the moons with a telescope in 1608
What is a Refracting Telescope? A telescope that uses convex lenses to gather a large amount of light onto a small area
What is a Reflecting Telescope? A telescope that uses mirrors to focus a large amount of light onto a small area
What is the difference between refracting and reflecting telescope?
What is a Radio Telescope A telescope that uses curved, reflecting surfaces to concentrate faint radio waves from outer space onto small antennas
Four views of the Crab Nebula using different telescopes