Does Mr. Markham exist?

Students give arguments for the existence of Markham, based on their reading of Plato.

Does this chair exist?

Does Plato think that things you can see, feel, or touch are not a genuine article, but merely a shadow of the real thing?

Is the outward circumstance a dream?
We think we understand the real world, but because we are trapped in our bodies we can see only the shadows on the wall. According to Plato, we should not be a slave to our senses.

Shaw: "Better keep yourself clean and bright: you are the window through which you must see the world".

What is the self? Is the self "consciousness"?

IGSS Science:
Lab - Analyzing Greenhouse Gases and Global Temperature Data Over Time
Students will determine whether amounts of greenhouse gases in the atmosphere have been increasing by graphing temperatures over time and looking a projected trends that the group has established.

Part I: Analyzing the student graphs produced. Students compare their graph to Annual Mean Temperature Graph: 1866-1996

Part II: Historical Data of Carbon Dioxide
Questions:
Are all temperature changes related to human activity?
Does C02 lag temperature or do temperature changes lag C02? What does this imply?
Besides humans, what are other factors that could related to carbon dioxide emissions?
How can ice cores, sea floor sediments and tree rings tell us about the past?

Part III: C02 --Atmospheric Carbon Dioxide Measured at Mauna Loa, Hawaii
Assuming the current rate of increase continues for the level of C02, predict the levels of atmospheric C02 in the year 2025? 2050?

Part IV: How has the C02 concentration changed over long time scales? What were the pre-industrial concentrations? How has the CH4 concentration changed over long time scales? What were the pre-industrial concentrations. Looking at graphs, determine how the N20 concentrations have changed over long time scales? What were the pre-industrial concentrations?