Tuesday, September 21, 2010

Gases and Climate Change

Combustion demo:
Hypothesis: If the rubbing alcohol is evaporating inside the bottle, then the gas with ignite when the fire is placed inside the bottle.

Observations:I was not expecting the reaction. When the lighter was near the gas, it flew away from the flame. There was a blue flame that was produced when the flame was near the rubbing alcohol. The bottom of the bottle was coated in a thin layer of soot. The bottle shot back at least 7 feet.

Human activities and the natural world both play a part in the emission of greenhouse gases. Nature releases its own greenhouse gases, but with the rise of human activity, there is more. We are contributing to the amount of gases that are put into the air. Factories and modes of transportation are other contributors to the greenhouse gas. The gas that they produce, goes into the air and because of the protective atmosphere, stays trapped up there.

CO2 gas demo:

Hypothesis: The carbon dioxide from the baking soda and vinegar, once placed near the candle's flame, will put out the two flames.

The flame of a candle needs oxygen to "survive". When it was introduced to the carbon dioxide gas, the flame was put out. The CO2 from the baking soda and vinegar, somewhat coated the flame, putting it out.

I would have to agree with Robert Fabricant, because I do not think that carbon dioxide is a pollutant. We just have an abundant source of it. Nature is not the one that is producing all of the carbon dioxide, it is us. We are cutting down trees and burning them, which is releasing it into the air. Nature has its balance of carbon dioxide, like with the animals and plants. When animals and plants die, they release it into the air.

Hydrogen Gas Demo:

Hypothesis: If the hydrogen gas is produced from the two elements being used, then a flame will ignite.

When the hydrochloric acid and the zinc where introduced to each together, the liquid started to bubble. When the flame was introduced, it fired immediately. Once the gas ran out, then the fire went out as well. The beaker was hot and the zinc pieces disappear, leaving smaller pieces. It produced an awful smell. Even after the flame went out, the liquid continued to bubble.

Only 8% of the world's energy is renewable resources. This shows how dependent we are on non renewable sources. Once it is gone, it is gone forever. There is no getting it back. So what to we burn off is no longer of use to us.

Air Pressure Demo:

Hypothesis: If the heated can is place in the ice cold water, the can will rise to the surface of the water, because heat rises.

Observations: The reaction was that nothing happened. When the can was placed in the water, the vapor gradually slower because the water inside the can was cooling off.

Hypothesis: If the can is placed in the water, then the can will raise and float, because heat rises up.

Obsevations: When the steaming can was placed in the ice cold water, the can became smushed together. The sides of the can caved in.

Differences Ideas:
When the can was placed in the water (2nd time) the gas did not have anywhere to go. We created a vacuum and there was a change in the air pressure. The water wanted to take up that space, but because it had no where to go, so it pushed it. In the first experiment, the pressure could get in through to the top, but on the second time, the air pressure had no where to go.

Scientists are saying that in the past 50 years, they have noticed a significant change in the air pressure. This is mostly due the affect humans have an the Earth. Air pressure is playing a large role in the climate change. It controls the circulation in the atmosphere, which therefore is in charge of how the moistures move. Because of the air pressure, then it will affect to rain fall and other things that can have a huge impact on the environment.

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