DO NOW! HAPPY THURSDAY!!!
September 27, 2012
Quiz Debrief:1. How do you think you did on Tuesday’s quiz?2. If you don’t think you did well, what can you do to
make sure you do AWESOME next time?3. If you think you did well, what made you successful?Quick Review:4. When an oceanic plate collides with another oceanic
plate, which plate sinks?5. Continental-Continental, Continental-Oceanic and
Oceanic-Oceanic are all types of _________ boundaries.
LEQ #4
Why are trees, volcanoes and ice
key to our understanding of earth’s history?
Let’s start with volcanoes…
Get ready for your mind to be…BLOWN!
The Earth actually gets COLDER after big volcanic eruptions!
How do volcanic eruptions effect the
Earth’s temp? 1. Dust, ash,
glass, and rock are released into the air during a volcanic eruption.
2. These things block the sun from reaching earth!
Clouds of ash can cover entire
continents!
In 2010, the Icelandic volcano Eyjafjallajokull erupted, spewing thousands of tons of ash into the air. 95,000 European flights were cancelled as a result of the eruption!
What information do Ice Cores & Tree Rings tell us?
-Tell us how the CLIMATE has changed over
time
Ice core- a sample of ice and snow that have built up over thousands of years
-tell the amount of gasses in Earth’s atmosphere over time.
Why do we care about ice?
What do ice cores tell us about the climate?
Black or brown coloring- VOLCANIC ERUPTION (color caused by the ash)
Yellowish color-Pollution in the air
Bubbles- Carbon Dioxide (CO2) is in the air (lots of bubbles means that is was HOT!)
Why do we care about trees?
Tree Rings: tell the amount of rain over time-Big Rings- A LOT OF RAIN -Skinny Rings- DROUGHTS
Why do we care about trees?
Tree Rings-One ring= one year *Youngest- on the outside *Oldest- on the inside
STATION TIME! -Groups of three -3 stations:
1. Tree Ring2. Ice Core3. Index Fossils
-At each station you will answer the questions on the bottom of your notes.
-You will have 8 minutes at each station before Ms. K will say ROTATE!
DONT’S-Walk around the
room-Move before Ms. K
tells you to-Mess with the
materials-talk to other groups-be off task!-throw things
DO’S-Remain at your
group- TALKING TO YOUR
2 PARTNERS- On Task - Answer all
questions fully- Respect the
classroom and materials
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