science

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Across
  1. 2. oil type of petroleum that is a mixture of liquid hydrocarbons.
  2. 3. type of force that acts in a circle and causes an object to rotate.
  3. 4. coal type of coal that is used to make electricity.
  4. 7. measure of the amount of force exerted on an object over a certain area.
  5. 8. unit of power equal to the rate of doing work of 1 joule per second.
  6. 11. process by which coal is formed from the remains of plants and animals.
  7. 12. coal type of coal that is formed from the remains of plants that lived in forests.
  8. 13. unit of energy equal to the work done by a force of 1 newton that moves an object 1 meter.
  9. 16. force type of force that acts in a straight line and does not change direction.
  10. 17. type of fossil fuel formed from the remains of plants and animals that lived millions of years ago.
  11. 19. process by which petroleum is formed from the remains of tiny marine organisms.
  12. 20. force that pushes or pulls on an object.
Down
  1. 1. type of fossil fuel formed from the remains of tiny marine organisms that lived millions of years ago.
  2. 5. type of petroleum that is used to make plastics, fertilizers, and other products.
  3. 6. unit of force equal to the force that accelerates a 1-kilogram mass at a rate of 1 meter per second squared.
  4. 9. coal type of coal that is used to make coke, which is used in blast furnaces to make steel.
  5. 10. gas type of petroleum that is a mixture of gaseous hydrocarbons.
  6. 14. coal type of coal that is formed from the remains of plants that lived in swamps and marshes.
  7. 15. petroleum type of petroleum that is used to make gasoline, diesel fuel, and other fuels.
  8. 18. unit of pressure equal to the force of 1 newton exerted over an area of 1 square meter.