1. Technology in Action (p.367-373)

2. Technical Objects
An object conceived and manufactured by humans to meet one or more needs or wants
Materials- used to make parts of a technical object
-Materials ex. Wood planks
- Equipment ex. Saws, hammers, etc.

3. Raw Materials
Natural substance, must be transformed: trees

4. Material
Substance that has been transformed:
Ex. Wood planks

5. Equipment
Instruments used to produce an object
Ex. Saw etc.

6. Mechanical Constraints
Describes the stress produced within the material when it is subjected to external forces

7. Compression
Compression: force that crushes materials

8. Tension
Tension: Force that stretches materials

9. Torsion
Torsion: Force that twists materials

10. Bending
Bending: Force that bends materials

11. Shearing
Shearing: Force that cuts or tears materials

12. Resist Mechanical Constraints
Materials- resist constraints before being deformed 3 Types Elastic (material regains its shape), Plastic (remains deformed) , Fracture (material ruptures)

13. Mechanical Properties
Determines how a material will react when it is subjected to one or more mechanical contraints

14. Hardness Ability to resist penetration when force is applied
(elastic deformation)
Ex. Marble is hard

15. Tensile strength
Ability to resist tension without becoming permanently deformed (elastic deformation)

16. Resilience
Ability to resist impact (elastic deformation)

17. Malleability Ability to be flattened or bent without breaking
(reacts to bending or compression by plastic deformation)

18. Ductility Ability to stretch without breaking
(tension force by plastic deformation)
Ex. Copper can be drawn into a wire

19. Elasticity
Ability of an object to return to its original shape when the force acting on it is removed

20. Electrical Conductivity *
Ability to conduct an electrical current

21. Thermal Conductivity*
Ability to conduct or transfer heat

22. Coefficient of Thermal Expansion*
Property characterizing the relative increase in the volume of a body according to the increase in temperature

23. Corrosion resistance*
Ability to resist the action of smoke, salt, and chemical products that cause corrosion(rust)

24. Basic Mechanical Functions
Parts or fluids that have a mechanical function
Basic Mechanical
- role of a component or group of components
in the function or assembly of an object.

25. Guiding
Basic mechanical function of any component that controls the motion of one or more moving parts.

26. Guiding Allows rotation Ex . Hole punch Translation motion
Rotatinal
Translational
Allows rotation
Ex . Hole punch
Translation motion
Ex. Groove in handle

27. Thermometer

28. What would be the components. What would be guiding
What would be the components? What would be guiding? What type of motion does a thermometer have?

29. Make a Thermometer What do you need? Tap water
Rubbing alcohol (do not drink this)
Clear, flask
Food coloring
Glass Tube
Rubber stopper

30. What to do?
Pour equal parts of tap water and rubbing alcohol into the flask, filling about 1/8 to a 1/4 of the bottle.
Add a couple of drops of food coloring and mix.
Put the straw in the flask, but don't let the tube touch the bottom (DO NOT DRINK THE MIXTURE).
Use the rubber stopper to seal the neck of the flask, so the glass tubing stays in place.
We will then turn the flask into a thermomter.