G8 U2

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Across
  1. 4. energy due to motion
  2. 8. the unit of energy in the International System of Units. It is equal to the amount of work done when a force of 1 newton displaces a mass through a distance of 1 metre in the direction of the force applied
  3. 11. the energy which is stored in the bonds of chemical compounds (molecules and atoms)
  4. 12. the ratio of output work to input work. Usually expressed as a percentage
  5. 15. an energy resource that is available in limited amounts or that is used faster than it is replaced in nature
  6. 16. the amount of energy transferred to an object by an external force when it is moved over a certain distance by that force
  7. 17. the energy contained within a system that is responsible for its temperature. Heat is the flow of thermal energy
  8. 19. heat energy from the earth
  9. 20. energy stored in and released from the nucleus of an atom
  10. 21. stored energy due to the interactions between objects or particles
  11. 22. the unit of power or radiant flux in the International System of Units, equal to 1 joule per second or 1 kg⋅m²⋅s⁻³. It is used to quantify the rate of energy transfer
  12. 23. contact force that resists the sliding motion of two surfaces that are touching
  13. 24. the total energy of an isolated system remains constant; it is said to be conserved over time
  14. 25. the ability to cause change
Down
  1. 1. the remains of ancient organisms that can be burned as an energy source
  2. 2. sum of the potential energy and the kinetic energy in a system
  3. 3. a push or a pull on an object
  4. 5. an energy resource that is replaced as fast as, or faster than, it is used
  5. 6. radiant light and heat from the Sun that is harnessed using a range of technologies such as solar power to generate electricity
  6. 7. energy carried by an electromagnetic wave
  7. 9. a type of flow diagram in which the width of the arrows is proportional to the flow rate of the depicted extensive property
  8. 10. the unit of force in the International System of Units (SI). It is defined as 1 kg⋅m/s2, the force which gives a mass of 1 kilogram an acceleration of 1 metre per second per second
  9. 13. energy carried by an electric current
  10. 14. energy carried by sound waves
  11. 18. energy that harnesses the power of water in motion, such as water flowing over a waterfall, to generate electricity