Gases and Climate Change

1)Combustion
Hypothesis: If the rubbing alcohol is put in the 2 liter bottle then it will catch on fire when it is ignited.
Observations: When the lighter got close enough to the bottle the it could ignite it, the bottle shot across the room, full of fire for a second. It went whoosh.
Slide Show: A lot of gases effect our environment. Lots of gases harm our environment some admitted by people and some admitted by natural things.

2) CO2 gas
Hypothesis: If the gas is combined with the flame then the gas will ignite.
Observations: When the gas and the flame were introduced the gas put out the flame.

3)Hydrogen gas
Hypothesis: If hydrogen gas is introduced to flame then it will com bust
Observation: It made a popping, bubbling noise. The gas ignited and burned until all of the zinc, used to create the chemical reaction creating gas, was gone and no longer helped produce the gas.

4) Air Pressure
Hypothesis: if the can with gas in it is placed into the ice bath then it will turn back into liquid.
Observation: the can had water in it and was heated on a hot plate until vapor started to come from the top then nothing happened when the can was placed in the ice bath

Part. Two air pressure
Hypothesis: if the can is placed into an ice bath face down then bubble will be created under the water.
Observation: the can was heated with water in it. Then when placed face down in cold water the can was crunched.

Chernobyl's effects linger on

This article talks about how the chemicals from Chernobyl are still effecting the environment today. Also, how the radiation keeps re-entering the environment and how the environment was thought to clean itself much faster than it did. The chemicals keep re-entering the environment. They do this when the radiation is passed from the soil to a plant then an animal. If the animal dies it then starts the process over again. If it is eaten by a different animal then the radiation in passed on to that animal.

1) In which two place do fish have a high level of caesium 137?

2) Up to how many years will food restrictions in the United Kingdom and the former Soviet Union remain?

3)Why should sheep be kept out of the food chain?

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