links in technical objects

Links in Technical objects

• A link is a fastening unit that attaches two parts of an object together

• Different types of links have different characteristics

• Removable: the parts can be taken apart without causing damage to the object

Non-removable: taking the linked parts apart will damage the object (aka “permanent” link)

• Direct: the parts “fit together” without a fastener, like puzzle pieces or Lego blocks

• Indirect: the parts need something to hold them together (like glue, a screw, a rivet…)

• Complete: no movement between the linked parts

• Partial: there can be movement between the linked parts

• Rigid: there is no bending between the linked parts

• Flexible: one of the linked parts can bend without breaking the object

Types of Links and Guiding Controls

• Open your workbook to page 18-19. Complete the tables referring to textbook pages 392-394. Remember to describe the characteristics in your own words.

What is Energy?

?https://www.youtube.com/watch?v=MpKZuhilzR4

Class work

• Refer to pages 396 and 397 in your text book. Complete pages 20-21 in your workbook.

Explain how the energy is transformed in each example shown:

1. Wind turbines

2. Electric mixer

3. Car motor

4. Light bulb

5. Eating food

6. Solar panel

7. Radio

8. Roller coaster

9. Elastic

Energy Transformations

• https://www.youtube.com/watch?v=i6e-KrNCe_E

• Energy cannot be created or be destroyed. It can only change forms. Energy transformations can occur naturally in our world, or take place in technological systems that we build.

• Refer to p. 398-400 in your textbook and complete page 22 in your workbook.