Physical Science

2. the processing of light bending around an obstacle or spreading out after it moves through a small space
6. the force exerted by magnets when they attract or repel each other
7. a substance that flows freely but is of constant volume
8. strength or energy as an attribute of physical action or movement
11. the process of joining two or more things together to form a single entity
12. a measure of the opposition to current flow in an electrical circuit
15. an electromotive force or potential difference expressed in volts
16. a thing that is composed of two or more separate elements
18. the maximum extent of a vibration or oscillation, measured from the position of equilibrium
19. the action of splitting something into two or more parts
21. process by which heat is transferred by movement of a heated fluid such as air or water
22. a rigid bar resting on a pivot
23. abrupt change in the direction of propagation of a wave that strikes the boundary between different mediums

1. the change in direction of a wave passing from one medium to another caused by its change in speed
3. the basic unit of a chemical element
4. a substance or matter in a state in which it will expand freely
5. the speed of something in a given direction
9. pure substance consisting only of atoms that all have the same numbers of protons in their nuclei
10. a form of energy resulting from the existence of charged particles
13. the movement of electrically charged particles through a transmission medium
14. the action or process of moving or being moved
16. composed of individual electronic components
17. firm and stable in shape
20. propagation of disturbances from place to place in a regular and organized way
21. the rate at which charge flows through a surface