Coal, oil, and natural gas are the main three nonrenewable primary energy sources.
The three classifications of sources of information are primary sources, secondary sources, and tertiary sources. Primary sources offer firsthand accounts or original data, secondary sources analyze and interpret primary sources, and tertiary sources provide summaries and overviews of information from primary and secondary sources.
The Sun: The primary source of heat energy on Earth is the Sun, which emits electromagnetic radiation that warms the planet. Geothermal Energy: Heat energy derived from the Earth's internal heat sources, such as volcanic activity and geysers. Combustion: The burning of fossil fuels, wood, or other materials releases heat energy as a byproduct of the chemical reaction.
The three sources of food energy are protein, carbohydrates (sugars), and fats.
CARBOHYDRATES FATS PROTEIN
gold,god,glory
gas liquid air(oxygen)
a lot. about 3.
1. GOLD 2. Silver 3. Agriculture
Petroleum, natural gas, and coal
Sources of energy that can make matter emit light include heat energy (thermal radiation), electrical energy (electric discharge), and chemical energy (luminescence from chemical reactions).
1) Direct talk with the primary sources 2)Telephonic interaction 3) Email information gathering 4) Recordings of repository data taken by previous researchers