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