Carbon Cycle, Greem House, Technology Flashcards
(18 cards)
Name the 6 greenhouse gases
Carbon dioxide Methane Nitrous oxide Water vapour Ozone Chlorofluorocarbons
What is the worst polluter?
Carbon dioxide
2nd worst pollutor
Methane
What is heating up the planet?
Infrared rays are heating up the planet
How is carbon released naturally into the atmosphere
Living things (plants, animals) The ocean (ice holds onto co2) Fossil fuels (coal,petroleum, natural gases) Volcanic eruptions
How is carbon released due to human activity into the atmosphere?
Burning fossil fuels (cars,factories,heating) Animal farming (cows,pigs) Deforestation (cutting down trees, they absorb co2 and release oxygen)
Decideous trees
Slow growing
Hardwood (good for heat (fireplaces))
Ex: oak trees, maple trees
Conifer trees
Fast growing trees
Softwood (good for sculpting)
Ex; pine trees, spruce trees
Sheets of wood become…….
Plywood
Wood chips become………..
Particle board
What can destroy wood in the wild
Fungus
Insects
Water
What is an alloy?
A mixture of metal atoms
Ex; stainless-steelis composed of
Iron, Chromiun , Nickel
Advantages of ceramic
Hard
Brittle
Low thermal conductivity
Ceramic disadvantages
Low electrical conductivity
What is plastic often made from?
Petrolium, it can be shaped and modded when heated
What are thermoplastics
They can soften and melted big enough heat is applied
Ex; styrofoam, teflon
What are thermosets
They do not soften or melt no matter how much heat is applied
Ex; melamine resin
Plastic can be degraded through ultraviolet light
What is a composite
A material made from 2 or more materials
