Physical Science

1. a rigid bar resting on a pivot
5. the processing of light bending around an obstacle or spreading out after it moves through a small space
8. a substance or matter in a state in which it will expand freely
9. the action of splitting something into two or more parts
10. propagation of disturbances from place to place in a regular and organized way
13. pure substance consisting only of atoms that all have the same numbers of protons in their nuclei
15. the rate at which charge flows through a surface
17. a thing that is composed of two or more separate elements
18. process by which heat is transferred by movement of a heated fluid such as air or water
20. composed of individual electronic components
21. a form of energy resulting from the existence of charged particles
22. the action or process of moving or being moved
23. the force exerted by magnets when they attract or repel each other

2. the change in direction of a wave passing from one medium to another caused by its change in speed
3. strength or energy as an attribute of physical action or movement
4. firm and stable in shape
6. the process of joining two or more things together to form a single entity
7. a substance that flows freely but is of constant volume
11. an electromotive force or potential difference expressed in volts
12. the maximum extent of a vibration or oscillation, measured from the position of equilibrium
14. a measure of the opposition to current flow in an electrical circuit
15. the movement of electrically charged particles through a transmission medium
16. abrupt change in the direction of propagation of a wave that strikes the boundary between different mediums
19. the speed of something in a given direction
24. the basic unit of a chemical element