Thursday, November 06, 2008

Echolocation: Scientific Speculation Sheet
5 November 2008

A glimpse of yesterday's science:

Materials Used:
2 pieces of card stock (8 x 11)

Procedure: (What you will do or what you did?)
Make megaphones.
One person talks through megaphone towards a wall of the house. The other person puts the small end of megaphone next to his ear, stands at a slight right angle to the wall and listens. Try it with and without the megaphone. (Notice Zander was the official noise maker.)
Try this with different objects (metal, wood, and brick).
Hypothesis: (What you think will happen and why?)
Zander – I’ll make a whale sound and you’ll hear it the same with or without the megaphone. “Nolan, do you want to get back to practicing to be as great as I am?"

Nolan – the sound will be louder with a megaphone. Think the echoes will be best with wood walls.

Arielle – The sound will be louder with the megaphone. I think the sound will be same no matter what object we use.

Results: (What actually happened?)
Sound is louder with the megaphone to our ears. Nolan thought the sound echoed better with the wood. Arielle thought it echoed better with the glass.

Conclusion: (What have you learned?)
Sound/echoes are heard better with megaphones. This is sort of how echolocation works for whales. We aren’t sure which material was supposed to reflect the sound better. Maybe it didn’t work well for us because Zander might have been making sounds at different volumes?

©2008 D.R.G.


Paula said...

This looks like true scietific method at work. Well done!
My hypothesis would be that glass would reflect sound waves better just as it reflects light better--because of a smoother surface probably? It would be tough to judge though.

Debbie said...

Cool science. I alwaya have to chuckle at Zander and his unigue take on things.

DeEtta @ Courageous Joy said...

Ah, Debbie, I love that you love Zander.

Jodi said...

Seems that most experiments that depend on consistency and have litle boys involved don't always lead to expected results!

Cynthia said...

I MUST take time to blog about some school things soon or the year will be over and then why bother >VBG>! I always enjoy hearing what everyone else is doing.

Laura said...

I know I have asked you before (my decrepitude is showing) but what are you using for science?
Great experiment!

DeEtta @ Courageous Joy said...

Laura - Apologia Elementary - Zoology 2....sorry about that. I usually put a link in to the book when I post about our science activities. LOL