1. What do the organizers of Earth Hour want everyone to do at 8:30 PM?
The organizers of the Earth Hour want everyone to turn off there lights and other electronics for an hour.
2. What is the point?
The point of Earth Hour is to conserve energy and to act against global warming.
3. When was the first Earth Hour?
The first Earth Hour was in Sidney in 2007.
4. The website talks about the big upcoming election: Planet Earth vs. Global Warming. How would one vote for Planet Earth? How would one vote for Global Warming?
I would vote for Planet Earth by turning off lights in my house and using nothing that uses electricity i would also try to convince others to do the same by posters and letters. A person who votes for Global Warming by using electricity during this hour and using things are charged with electricity.
5. What are five things that you could do during Earth Hour to celebrate the event?
Five things that we could do during Earth Hour to celebrate during this event are turn of the lights in your house,turn of cell phones, turn off ipods,turn off computer,turn off air conditioner.
Friday, March 27, 2009
Wednesday, March 18, 2009
Dating Methods
1. What is relative dating? (hint: not when two cousins go on a date)
Relative dating is the process by which rocks are placed in their proper order;Only the chronological order of events is determined,not the absolute age in years.
2. When would a geologist use radiometric dating?
Geologist use radiometric dating to calculate the ages of rock minerals that contain certain radioactive isotopes.
3. When would a geologist use radiocarbon dating?
A geologist would use radiocarbon dating to determine age by comparing the amount of carbon-14 to the amount of carbon-12 in a sample.
4. Explain how you can use tree rings to date and study the recent past? (see p. 351)
The tree rings show of many seasons the three have went through and the way the rings look you can conclude if the tree was dead or live.
5. What is half-life?
Half-Life is the amount of time necessary for one half of the nuclei in a a sample of decay to its stable isotope.
6. Explain how today's lab showed half-life.
Relative dating is the process by which rocks are placed in their proper order;Only the chronological order of events is determined,not the absolute age in years.
2. When would a geologist use radiometric dating?
Geologist use radiometric dating to calculate the ages of rock minerals that contain certain radioactive isotopes.
3. When would a geologist use radiocarbon dating?
A geologist would use radiocarbon dating to determine age by comparing the amount of carbon-14 to the amount of carbon-12 in a sample.
4. Explain how you can use tree rings to date and study the recent past? (see p. 351)
The tree rings show of many seasons the three have went through and the way the rings look you can conclude if the tree was dead or live.
5. What is half-life?
Half-Life is the amount of time necessary for one half of the nuclei in a a sample of decay to its stable isotope.
6. Explain how today's lab showed half-life.
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