Across
- 2. a substance produced in a chemical reaction
- 4. a scientific law stating that no energy is created or destroyed during energy transfer
- 5. anything that has mass and takes up space
- 7. an increase in volume
- 9. a measure of the quantity of matter
- 13. the name chemists use for a substance, which refers to the names of the elements in that substance
- 15. a phase of matter that has no definite shape or volume. Particles of gas fly independently through space.
- 16. a code that represents the number and kinds of atoms in one particle of a substance
- 18. a fundamental substance that cannot be broken into simpler substances by chemical or physical processes. Made of only one type of atom.
- 19. the transfer of energy (heat) from one particle to another as a result of contact
- 20. a phase of matter that has definite volume and definite shape. The particles of a solid are tightly bonded and cannot move around (but they do move slightly)
- 22. a measure of the average kinetic energy of the particles in a substance
- 23. a substance defined by a particle composed of two or more different kinds of atoms
- 25. an attractive force between atoms
- 26. a phase of matter that has definite volume but no definite shape. Loosely bonded particles in liquid can flow over and around one another.
Down
- 1. the reduction of volume of a sample of matter as a result of cooling
- 3. a starting substance in a chemical reaction
- 6. the movement of energy from one location to another
- 8. a condition in which a system is experiencing no net change
- 10. a type of matter defined by a unique particle
- 11. a process during which the atoms of starting substances (reactants) rearrange to form new substances (products)
- 12. energy of motion
- 14. an increase in volume
- 17. the smallest particle of an element
- 21. energy transfer that increases the kinetic energy of a substance’s particles
- 24. a particle made of two or more atoms that are held together with strong (covalent) bonds