Energy Review

5. What allows us to work?
8. Is hard coal which is a highly desirable fuel bemused of its high heat content and low sulfur content and because it burns cleaner, unfortunately, it is a limited resource
10. Second most used energy source in Ecuador
11. Energy in a transformed stage
13. Who is the fifth largest producer of crude oil in South America?
14. Who consumes large amounts of energy because many industries are established
15. Remains of natural organisms that with time and pressure have become oil

1. Energy derived from sources that will run out during the human lifetime, it will not be replenished.
2. What are fossil fuels mostly composed of?
3. Which is extensively used as fuel because of its high heat and large supplies (contains high sulfur)
4. Brown coal with low heat content, low sulfur content with a limited supply
6. Energy forms that can be used directly from nature, do not have any previous conversion
7. First stage of coal with low heat where partially decayed plants in swamps and bogs
9. Energy that can be easily replenished, and won’t end during the human life span
12. What do we call a combustible mineral made of carbon formed from organic matter after millions of years of compression?