1. 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

2. 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)

3. 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…)

4. Complete: no movement between the linked parts
Partial: there can be movement between the linked parts

5. Rigid: there is no bending between the linked parts
Flexible: one of the linked parts can bend without breaking the object

6. Types of Links and Guiding Controls
Open your workbook to page Complete the tables referring to textbook pages Remember to describe the characteristics in your own words.

7. What is Energy? ?

8. Class work
Refer to pages 396 and 397 in your text book. Complete pages in your workbook.

9. Explain how the energy is transformed in each example shown:
1. Wind turbines

10. 2. Electric mixer

11. 3. Car motor

12. 4. Light bulb

13. 5. Eating food

14. 6. Solar panel

15. 7. Radio

16. 8. Roller coaster

17. 9. Elastic

18. Energy Transformations
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 in your textbook and complete page 22 in your workbook.