The document discusses the purpose and function of parachutes. It describes how parachutes use air resistance and gravity to slow falling objects by providing a large surface area to interact with the air. The document outlines an experiment to test how parachute size impacts falling speed by having students construct parachutes of varying circle sizes out of material and test their descent rates. It explains that too large a parachute falls too slowly while too small falls too quickly, and that air resistance and gravity work together to allow the parachute to float down instead of floating away.

1. Scientific Enquiry Unit Science and Technology Topic Invention Matthayom 5

2. The world’s best parachute

3. What a parachute is? What it does?

4. A parachute is a large piece of cloth or fabric that slows down an object when falling through the air.

5. Scientific Enquiry What would happen if the parachute was really to big ? What would happen if it was too small? Why does a parachute float?

6. Scientific Enquiry gravity

7. Scientific Enquiry air resistance

8. Scientific Enquiry floating

9. 30cm square pieces of thin material cotton thread

10. scissors masking tape Plasticine

11. Scientific Enquiry Cut out a circle from each piece of material.(the size was vary) Attach four pieces of cotton to the material with the tape. The loose end of the cotton should attach to a small piece of Plasticine.

12. Scientific Enquiry Can you explain why your parachute worked? What problem did you have when you were testing it?

13. Scientific Enquiry A parachute work because in the air have air resistance so that it help a parachute slow down when it falling through the air and have gravity so that it keep a parachute come down not float away.

14. Scientific Enquiry If a parachute is too big it will fall down slowly. If a parachute is too small it will fall down quickly.

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