Due to heavy pressure and temperature of catastrophic upheavals
They got their energy from the sun.
Ultimately, all energy only comes from the Sun. This is how the energy is transferred: Sun>plants>animals. Therefore, fossil fuels obtain their energy from plants itself and animals when they've consumed plants.
plants and animals
Fossil fuels contain energy that originally came from the sun.
Nearly all energy on the earth comes originally from the sun - including fossil fuels. To the best of our knowledge, fossil fuels come from the conversion of deposits of matter that was once living into the fuel via lots of pressure, heat, and time after it was buried deep in the crust. The plants that contribute to the fossil fuels got their energy from the sun via photosynthesis. The animals got their energy ultimately from the sun by eating plants that got their energy from the sun by photosynthesis or other animals that ate the plants that got their energy from the sun by photosynthesis.
Plants derive energy through photosynthesis, where they convert sunlight into chemical energy. Animals obtain their energy by consuming plants or other animals. In this way, energy flows through the food chain, with each organism relying on the energy stored in the organisms they consume. Before the formation of fossil fuels, the primary sources of energy were natural phenomena such as sunlight, wind, and organic matter from living organisms.
Ultimately, all energy only comes from the Sun. This is how the energy is transferred: Sun>plants>animals. Therefore, fossil fuels obtain their energy from plants itself and animals when they've consumed plants.
fossil fuels
plants and animals
Plants and animals both store energy found in fossil fuels by going threw a system call cell fertilization thru out their life.
Fossil fuels wwwwwwwere once living plants and animals. If they were plants they got their energy from the sun, and if they were animals they got their energy from eating plants who got their energy from the sun, or from eating animals who ate animals who ate plants who got their energy from the sun. In other words the sun is the source of all energy. The sun´s energy is stored in living beings, in plants and the animals that eat the plants, and if conditions are right, that energy is then stored in the form of fossil fuels.
Same way they get energy now. Plants get energy from sunlight via photosynthesis and animals get energy from eating plants and other animals.
fossil fuels
Fossil fuels contain energy that originally came from the sun.
well fossil fuels are from the dead remains of plants and animals
The sun. Fossil fuels are made up of plants and animals that lived in the past and have been converted to fossil fuels by geological processes over time. And as plants convert the suns energy into sugars, fossil fuels are stored solar energy.-----------------------------------------------------------------------------------------------The energy comes from the energy that was previously in dead plants/animals... to understand better read about the carboniferous period. It explains how fossil fuels were created, through the compression of decaying plant material that had lots of locked up carbon underneath layers of sediments.
Fossil fuels are energy sources that come from the reamins of plants and animals. These remains are millions of years old.
From the sun mostly, just like now.