"Bag It" Reflection 1

Today I watched a movie that is actually about "plastic bags". It tells about how much plastic is bad to us as well as our environment. Plastic bags will never be gone. It is made out of fossil fuels. This relates to Earth science.The topic that we learned about. Which is, energy sources. Energy sources contain Coal, petroleum, natural gas, and alternative energy. The biggest problem of the plastic it is pollution. I heard that 500 billion of plastic bags were made. It causes pollution to the air, water, etc. But it mostly pollutes ocean. The cause of the pollution from plastic made countries start to use paper bag or their own bag instead of plastic bag. So, nowadays many countries are banned to use plastic bags. Not only plastic bags, there are plastic bottles, aluminum can, plastic cups, etc. They were all used but thrown right away. I did not understand why people are making plastic if they are going to be thrown away in short time of period.(?) I think using paper bag is the best because it could be recycled over and over ( can be used a lot of time). However, also paper bag harms environment because to make paper bags they would have to cut down the trees. To sum up, it is relating what we learned and I would want everyone to recycle plastics. Then it will help our Earth to be GREEN.



         

Note taking exercise- Energy

      What is Energy?

• Energy- Everything we do like jump shot, baking cookies, and turning on the light.
• There are two types of energy

• 1.Stored energy- also called as potential energy, food you eat.
• Your body will store energy when you are eating and use it when you run, jump, play or etc.
• 2.Working energy- also called kinetic energy, when you are running, jumping and playing.
• Faster run,-more kinetic energy you have.
• Same as molecules, atoms and waves of sound and light.

       How is Energy generated?

• Biomass Energy

• Renewable
• Homegrown energy source
• Includes tress, farm crops, manure, plants and landfill gas.
• US biomass create 34% of all energy we use.

• Coal

• Creates more than half electricity by Americans.
• 1/4 of coals are from United states.
• Recoverable oil

• Gas

• Burned to used-clean burning
• natural gas became the fuel of choice for new power plants.
• became Increasingly popular 
• use gas turbines and combustion engines ti generate electricity

• Geothermal

• underground reservoirs of stream, hot water and dry rocks 
• It is produce electricity by extracting hot water or steam

• Hydrogen

• actually hydrogen is energy carrier
• but it can create power.
• It is environmentally clean fuel.
•  = Create electricity when hydrogen and oxygen converts to the water

• Nuclear Power

• generates energy similar to fossil fuel plant
• Nuclear power generates by heat

• Solar power

• It is available anywhere on earth
• It provides heat, cooling, lighting, mechanical power, hot water heater, etc
• Solar panel is the flat model used to provide energy by using this.

• Water

• can be used to generate electricity
• does not pollute earth(little)
• it is renewable
• if u dam river or ocean it will make fish or animals that are living in the water.

• Wind

• It is form of solar energy.
• It generates energy by mechanical power.

What is electricity?

• Is the flow of electrical power or change.
• secondary energy source
• what we get after we convert primary sources 
• coal
• natrual gas
• oil
• nuclear power
• and etc
• Primary sources- can be renewable or non-renewable 
• Electricity- neither renewable nor non-renewable

• Green/Alternative Energy in South California

• In California 1.6% electricity are renewable energy
• E.g wood
• black
• liquor
•  waster 
• landfill methane 
• etc.
• California have been using hydropowder to generate electricity since 1942