Heat Transfer and Climate Change Flashcards
(15 cards)
What is conduction? Example
Transfer of heat from one substance to another through direct contact
Stove
What is convection? Example
Transfer of heat from one substance to another through fluids (liquid or a gas) casused by molecular motion (hot fluids move up)
Boiling water (hot water moves up and cold water moves down to replace it)
What is Radiation? Example
Transfer of heat that is radiated in the form of rays, waves or particles.
Microwave
How does the radiation energy work?
Transmit - clear objects
Abosorbed - dark objects
Reflected - light objects
What is the Earth’s 4 spheres?
Biosphere - life
Lithosphere - land
Atmosphere - gases above earth’s surface
Hydrosphere - water
What is the carbon cycle?
Movement of carbon through all four spheres
How is the carbon cycle linked to climate change
Changes in the carbon cycle can results in more carbons in another place. So because of this, there is more carbon in the Earth’s atmosphere which warms up the planet.
3 types of radiation emitted by the Sun
Ultra violet, Visible and infrared
What is the visible radiation emitted by the sun?
Allows us to see and is abosrbed by the Earth’s opaque objects
What is UV?
Damaging to skin but is mainly abosrbed in the ozone layer
What is infrared radiation?
Heat and is mostly abosrbed by greenhouse gases in the atmosphere
What is greenhouse gases?
Greenhouse gases are gases that absorb and rememit heat (infrared radiation) back into the atmosphere.
Examples of greenhouse gases
carbon dioxide, methane and nitrous oxide
Difference between natural greenhouse gases and enhanced?
Natural greenhouse gas - The natural process where greenhouse gases trap heat in the Earth’s surface keeps the planet warm enough to support life.
Enhanced greenhouse gas - Increase in greenhouse gas caused by huuman activities which contribute to climate change
What are the 7 steps in the carbon cycle?
Photosynthesis, Transfer of carbon via food chain, Respiration, Decomposition or excretion, Formation of fossil fuel, combustion, formation of limestone
