ENERGY TRANSFORMATIONS (Energy Conversion) Flashcards
Where does almost all energy on earth come from?
The sun
How was the suns energy produced?
The suns energy is produced from a nuclear fusion of hydrogen nuclei which fused to form helium.
The sun’s surface temperature is about 5800 Celsius and emits electromagnetic radiation.
Describe the fate of Fate of radiation reaching Earth.
The sun emits about 341Wm^_2 of solar radiation of this a portion is reflected by both the earth,s surface and the clouds . Another part of it is absorbed by the earth. The earth also emits radiation from the. Arious activities that occur. Some of the emitted radiation is absorbed by the atmospher and remitted to the sun . Som of is blocked by the green houses and reflected back to the earth and is Absorbed.a small portion is also emitted by the clouds.
How does the suns energy affect wind patterns
The suns energy makes molecules move faster when energy is transformed from light to heat . This act heat up the air molecules causing them to rise because they become less dense as this air rises cooler and less dense air sinks to take its place causing winds and wind currents
How does the suns energy affect wave patterns
The suns energy makes molecules move faster when energy is transformed from light to heat . This act heat up the water molecules, the hot water molecules rise up and move away from the equator towards the poles. It eventually cools down and sinks as it becomes denser and this creates wave currents
The sun and the water cycle
The sun heats up water molecules causing it to evaporate and in the case of plants causing transpiration. These molecules condens in the clouds and when they become heavy enough the fall back onto earth as precipitation providing fresh water,
The sun and the biosphere
The energy that circulates through the biosphere is derived from the sun, the solar energy is captured through photosynthesis and produces both biomass and food .
Does the earth itself has energy ? If it does where does it conform ?
Yes it does . This energy is in the form of heat that was left over from the formation of planet earth.
What are some important energy transformations.
Chemical to thermal
Thermal to mechanical
Mechanical to electrical
How does chemical energy to thermal energy work
Fuels are forms of stored chemical energy , oxidation and combustion of fuels lead to release of energy and heat .
How is electrical energy transported ?
The electrons are separated from positive charges and forced along a closed path in conducting material.eg copper.
