Crossword Physics

3. A frequent or regular female companion in a romantic or sexual relationship.
6. Any of various devices for producing light or sometimes heat
8. Substance composed of the chemical elements hydrogen and oxygen and existing in gaseous, liquid, and solid states.
9. Basic state of matter.
11. Alteration in shape or size of a body under the influence of mechanical forces.
14. Theory in biology postulating that the various types of plants, animals, and other living things on Earth have their origin in other preexisting types and that the distinguishable differences are due to modifications in successive generations.
15. Change of a solid into a liquid when heat is applied.
17. Ability of a deformed material body to return to its original shape and size when the forces causing the deformation are removed.
18. One of the three principal states of matter, intermediate between gas and crystalline solid.
19. A covering for the foot, typically made of leather, having a sturdy sole and not reaching above the ankle.
20. The one that discover the law of elasticity
21. In physical sciences and engineering, number that describes relative deformation or change in shape and size of elastic, plastic, and fluid materials under applied forces.

1. The branch of mathematics concerned with the shape of individual objects, spatial relationships among various objects, and the properties of surrounding space.
2. Measure of hotness or coldness expressed in terms of any of several arbitrary scales and indicating the direction in which heat energy will spontaneously flow
4. One of the three fundamental states of matter, with distinctly different properties from the liquid and solid states.
5. Any of a class of substances characterized by high electrical and thermal conductivity as well as by malleability, ductility, and high reflectivity of light.
7. The perpendicular force per unit area, or the stress at a point within a confined fluid.
8. The principal strengthening and nutrient-conducting tissue of trees and other plants and one of the most abundant and versatile natural materials.
10. In mechanics, distance moved by a particle or body in a specific direction.
12. Region in which each point has a physical quantity associated with it.
13. Electromagnetic radiation that can be detected by the human eye.
14. An ornament for the ear and especially the earlobe.
16. Tool that astronomers use to see faraway objects.
18. Maximum stress or force per unit area within a solid material that can arise before the onset of permanent deformation.