Tuesday, September 21, 2010

Gases and climate change

If the rubbing alcohol is set on fire, then it will produce gas. -when the lighter got close to the bottle, the gaseous alcohol ignited and caused the bottle to shoot backwards with a loud WHOOSHing sound. Then it hit Miss Leland's desk and fell to the floor, where the fire went out and it stopped moving.

The way that gasses are produced and magnified by humans make a lot of sense. The ways that they effect the environment also seem logical, based on what is happening to the earth.

When the gas is introduced to the candle flames, the flames will flare up. -when the gas was introduced to the candles, their flames went out. :'(

Teachnically, CO2 is not classified as a pollutant becauee it is necessary in small quantities. For example, plants use CO2 in the process of photosynthesis. But on the contrary, too much of the gas is still quite detrimental. When CO2 is emitted into the atmosphere (usually through respiration and decaying plants and animals), it causes heat to be partially trapped in the atmosphere, warming the planet.

The flames will flare up when introduced to the hydrogen. -when the zinc and hydrochloric acid, it bubbled and produced hydrogen gas. When the lighter flame was held above the beaker, the hydrogen caused the flame flare up and catch on the bubbling liquid.

I think that the vapor will freeze inside the can. -Nothing happened. ~*~ I think that the water will get in the can and cause the water vapor inside will freeze. -The can imploded, crushing in on itself the instant it touched the ice water.

Friday, September 3, 2010

Chernobyl Article and Questions (DNA Change)

This article explains how the children of Chernobyl clean-up workers that were conceived and born after the incident were much more likely to have mutations and birth defects. There was a sevenfold increase in new bands between children born after Chernobyl and their siblings born before. Scientists think that somehow the mutations were caused by radiation becoming internal, seeing as there weren't really any sicknesses or mutations after the atomic bombs were dropped in Japan.

1. How many times more bands were found in post- Chernobyl kids than pre-?
2. Were the complications though to be caused by internal or external radiation exposure?
3. Why were children born and conceived after the incident more likely to be mutated?