Terminology

3. An upward force exerted by a fluid, that opposes the weight of an immersed object.
6. The rate at which the velocity of a body changes with time.
7. The mass density or density of a material is its mass per unit volume.
8. The measure of the opposition that a circuit presents to a current when a voltage is applied.
9. A property of materials that respond to an applied magnetic field.
11. An area of space which contains no matter.
12. The ratio of water vapor in a sample of air to the volume of the sample.
13. An electrically neutral group of two or more atoms held together by covalent chemical bonds.

1. A natural phenomenon by which physical bodies attract each other with a force proportional to their masses.
2. An elementary particle and a fundamental constituent of matter.
4. A scale and unit of measurement for temperature, also known as Celsius.
5. A physical process that results in the phase transition of a substance from a solid to a liquid.
10. An electrically neutral subatomic particle.