1. 5/19 & 5/20 - 8th Grade Agenda
Learning Objective: Learn about Telescope
Collect HW: Reading & Notetaking p.257– 258
Video: When we left Earth
Textbook Reading: p
HW: Reading & Notetaking p.260– 261

2. Daily Reflection
Prompt: Draw what an extra terrestrial life might look like on another planet and list 3 characteristics.

3. What are some examples of electromagnetic waves?
Radio Waves
TV Signals
Microwaves
Infrared rays
Light
Ultraviolet rays
X-Ray

4. What is the definition of electromagnetic waves?
An electromagnetic wave consists of vibrating electric and magnetic fields that move through space at the speed of light.

5. How fast do electromagnetic waves travel?
It is the fastest thing in the universe
300,000 km per second
186,000 miles per second
It takes 8 minutes for light to travel from the sun to the earth
It takes 3 million years for light to travel from the nearest galaxy (andromeda) to the earth

6. Electromagnetic Wavelength

7. How do we use Radio Waves?
Radio & TV signals
Microwave Oven
Radar
MRI
Cell phone

8. Visible Light makes up only a small part of the electromagnetic spectrum

9. Galileo’s Telescope
He was the first man to observe the moons of Jupiter and craters on the moons with a telescope in 1608

10. What is a Refracting Telescope?
A telescope that uses convex lenses to gather a large amount of light onto a small area

11. What is a Reflecting Telescope?
A telescope that uses mirrors to focus a large amount of light onto a small area

12. What is the difference between refracting and reflecting telescope?

13. What is a Radio Telescope
A telescope that uses curved, reflecting surfaces to concentrate faint radio waves from outer space onto small antennas

14. Four views of the Crab Nebula using different telescopes