Unit 5

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Across
  1. 4. of momentum – Total momentum of a system remains constant if no external forces act on the system.
  2. 6. of metal – Takes place when a chemical reaction occurs on a metal's surface while oxygen is present; electrons move from the metal to the oxygen molecules, creating a metal-oxide surface and producing heat and light.
  3. 9. – How far away an object has moved from its original position.
  4. 11. force – The weakest attractive force between any two objects; depends on the masses of the objects and distance between them.
  5. 14. decay – A beta particle emitted from an atomic nucleus.
  6. 16. force – The force that acts on all charged particles; attractive or repulsive force between a magnet and electric charges.
  7. 20. – The compound/elements that are present after the chemical reaction.
  8. 21. – The rate at which an object changes its velocity.
  9. 22. – A substance that neutralizes acid to form water; has a pH above 7.
  10. 23. decay – Contains no mass or charge; travels at the speed of light.
Down
  1. 1. – The spot where an object is placed, typically represented as coordinate(s).
  2. 2. – A parent atom that splits into two daughter atoms.
  3. 3. – Two or more atomic nuclei combining to form a new nucleus.
  4. 5. – The compound/elements that are present before the chemical reaction.
  5. 7. – A change in momentum over time.
  6. 8. – An object that behaves like any other magnet when there is an electric field running through it.
  7. 10. reaction – The rearrangement of atoms to form new substances with different properties.
  8. 12. – The rate at which an object changes its position.
  9. 13. nuclear force – The weak attraction in the nucleus between protons and neutrons; can cause neutrons to decay in the instance of a high proton-to-neutron ratio.
  10. 15. decay – A type of fission reaction that produces an alpha particle.
  11. 17. – A substance that neutralizes a base to form water; has a pH less than 7.
  12. 18. – Elements found on the left side of the Periodic Table and have properties such as shiny, malleable, and good conductors of heat and electricity.
  13. 19. – How much inertia an object in motion has.