CP Warm-up:
HONORS Warm-up:
1. Finish & grade group project Timelines from yesterday (P1 start timelines)
2. Watch Cosmos S1 E9 [CP WS Questions (turn-in), honors 5 facts pg#47] (only if Webquest is done!)
HW:
1. Late Timelines due Monday
2. Work on late test corrections
3. Work on late webquests (google classroom)
- How old have scientists calculated the Earth to be?
- How did they do it?
- What is the difference between all the brown events and all the green events on your group timelines?
HONORS Warm-up:
- How many years will it take for a sample’s radioactive Uranium-234 to decay from 1920 atoms to 120 atoms? A half-life of U-234 takes 245,000 years. (set up a 3-column table!) ¿Cuántos años se tarda en que el uranio-234 radioactivo de una muestra se desintegre de 1920 átomos a 120 átomos? Utilice el cuadro para encontrar la semivida conocida del U-234.
Let’s update!
1. Finish & grade group project Timelines from yesterday (P1 start timelines)
2. Watch Cosmos S1 E9 [CP WS Questions (turn-in), honors 5 facts pg#47] (only if Webquest is done!)
HW:
1. Late Timelines due Monday
2. Work on late test corrections
3. Work on late webquests (google classroom)
![](http://www.weebly.com/weebly/images/file_icons/rtf.png)
CPwscosmosepisode9worksheet.docx |