1. NATURAL SCIENCES GRADE 5 Energy & Change

2. NATURAL SCIENCES GRADE 5

3. What if we did not have wheels? If it was not for the wheel, then automobiles, trains, streetcars, farm machines, wagons, and nearly all factory and mine equipment would be useless NATURAL SCIENCES GRADE 5

4. How was the wheel invented?  No one knows when and by whom the wheel was invented  The best guess is that this happened in Asia about 10,000 years ago  The oldest wheel known was discovered in Mesopotamia and is believed to date back 55 centuries  It must have taken very long for the wheel to be developed NATURAL SCIENCES GRADE 5

5. How was the wheel invented?  Heavy loads were moved by carrying them or by using sledges, the backs of animals or by pushing them  Wheels were first used on carts because there were no smooth tracks to use. NATURAL SCIENCES GRADE 5

6. Can you name items that use wheels Can you name items that use wheels ? NATURAL SCIENCES GRADE 5

7.  Engines  Rollerblades  Microwaves  Wheelbarrows  Prams  Trolleys  Cars  Trucks  Motorbikes  Bicycles  Buses  Taxis

8. NATURAL SCIENCES GRADE 5

9.  http://www.thunderboltkids.co.za/Grade5/03-energy-and- change/chapter4.html# http://www.thunderboltkids.co.za/Grade5/03-energy-and- change/chapter4.html#