read & explain evidence activity
DESCRIPTION
Read & Explain Evidence Activity. Students divided into groups. There are 8 different evidence cards ( ppt slides). First, read it. What’s it say? Then, explain it. What’s it mean? Discuss the data or observation shown on the card. - PowerPoint PPT PresentationTRANSCRIPT
Read & Explain Evidence ActivityStudents divided into groups. There are 8 different evidence cards (ppt slides). First, read it. What’s it say? Then, explain it. What’s it mean?
1. Discuss the data or observation shown on the card.2. Be ready to describe this evidence to the class.3. How might this evidence be interpreted?4. Write your group-thoughts for 2 & 3 on the notesheet.5. Listen and jot notes on all the other evidence on
notesheet.
1. CO2 Concentration Curve
Preponderance of Evidence Resource Card 2
2. Temperature (1880- 2005)
http://data.giss.nasa.gov/gistemp/graphs/Year
Tem
pera
ture
Diff
eren
ce Fr
om N
orm
al
(°C)
Preponderance of Evidence Resource Card 3
Muir Glacier, Alaska
NSIDC/WDC for Glaciology, Boulder, compiler. 2002, updated 2006. Online glacier photograph database. Boulder, CO: National Snow and Ice Data Center.
August 1941 August 2004
3. Shrinking Glaciers
Preponderance of Evidence Resource Card 4
Source: Westerling et al. 2006
Western US area burned
4. Increasing Wildfire Risk
Preponderance of Evidence Resource Card 5
Source: Hansen, Clim.Change, 68, 269, 2005.
5. Ice Core Records
Time (years)
CH4
(ppb
)
C
O2 (p
pm)
Preponderance of Evidence Resource Card 6
UCS
UCS
6. Projected Changes in CA Summer Temp.
Preponderance of Evidence Resource Card 7
2004 >9,500 ft
1900 >7,800 ft
Pika
7. Species Habitat Shifting
Species that are sensitive to temperature conditions can only move up the mountainside as conditions get too warm for them lower down.
In the Sierras, Pika were seen at 7,800 feet and above in 1900. By 2004, they were not seen below 9,500 feet. This trend is expected to continue.
The mountains rise as high as 12,000 feet, but the rocky hillsides where Pika live do not reach that high.
Preponderance of Evidence Resource Card 8
8. Diminishing Sierra SnowpackPercentage Remaining, Relative to 1961-1990
UCS
Preponderance of Evidence Resource Card 9