Why? The Science Show For Kids Podcast
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The science show for kids. Each week Dr. Dave Brodbeck answers a question about science from real kids like you.
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http://www.youthscienceforum.ca/view.php?id=17
Episode 22 - How do Space Ships Escape the Earth's Gravity and Have We Ever Gone To The Sun?
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Sun, Sep 28, 2008
In this episode I decided to answer three questions at once. Austin from Massachusetts wanted to know how rockets can get away from our gravity. Well it is not done all at once, and it is not done from Earth. Typically space ships get up into orbit about oh 10 000 km up in space. That sounds pretty far, but GPS and communication satellites are about 40 000 km away from our home planet. So, once they get there they start to accelerate (speed up) and until they reach about 7 km/s (that is 25 500 km/h or 15 750 mph, which is pretty fast no matter how you measure it). That is fast enough to win what is really like a tug of war with the Earth's gravity.
Olivia from Washington state wanted to know if space ships had ever been to the Sun. Well of course not manned ships, but there have been a few unmanned ships that have gone. The closest flyby of the Sun was by a ship called Helios 2. She also wanted to know where the Sun came from, how was it created? Well, I touched on this in Episode 18. Basically there was this REALLY big cloud of molecules. Now, even single molecules have gravitational pull, so they started being attracted to on another. After a time (a really long time, about 50 000 000 years) the stuff at the center of this cloud really could be called a star. Oh when did this happen? The Sun is probably about 4.5 billion years old. 
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Episode 21 - How Does Your Brain Make Your Fingers Move?
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Fri, Aug 01, 2008
Jenna (I hope I spelled your name correctly...) wants to know how your brain controls your fingers. This is a really neat question, and because I am a psychologist, I did not have to ask anyone but myself. One of the very neat things about this is that the left half of your brain controls the right side of your body. Oh, and even though it feels like you move as soon as you want to, it takes at least 300 msec before anything actually happens in your fingers. The key to the whol thing is a neurotransmitter called acetylcholine.
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Episode 20 - Why does the human brain think so much?
Author: Dr. Dave Brodbeck (ask.dr.b#gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Wed, Jun 18, 2008
We are always thinking, even when it seems we are not thinking!
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Episode 19 - Why Isn't Greenland a Continent?
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Wed, Apr 30, 2008
Vince B. sent in a great question, why isn't Greenland considered a continent? Well I am no geographer, but I work with a guy who is, Dr. William Osei of the Algoma University Geography Department.
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Episode 18 - Where Did Stuff Come From?
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Sun, Mar 02, 2008
Addie from California asks: Where was the first form of structure (dust, stone, etc) formed and what was it?
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Episode 17 - Why Can't Fish Remember Stuff?
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Tue, Oct 23, 2007
Lucy wants to know why fish have no memories, it turns out they do!
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Episode 16 - Why Don't The Oceans Freeze?
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Mon, Sep 24, 2007
Paul wants to know why the oceans freeze in the winter?
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Episode 15 - What Happened to the Dinosaurs?
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Fri, Jul 27, 2007
Jessica and Cal want to know what happened to the dinosaurs.
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Episode 14 - Why Do We Have a Tongue
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Thu, Jul 05, 2007
Why so we have a tongue?
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Epiosde 13 - Why Do We Have Tonsils and an Appendix?
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Fri, Jun 01, 2007
Judy wants to know why we have tonsils and an appendix.
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Episode 12 - A Snails Slugs Without Shells?
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Sun, Apr 22, 2007
What came first, the snail or the slug?
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Episode 11 - What is the Shape of Space?
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Sun, Apr 01, 2007
Shosa from Karachi, Pakistan called in and wants to know what the shape of the universe is. (I hope I am spelling your name correctly, if not, I apologize!) He is our first questioner from outside North America. Exciting, but not as exciting as the answer!
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Episode 10 - What Makes Some Ice Clear and Some Ice White?
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Tue, Mar 20, 2007
Pearl Vick wants to know why some ice is white, and other ice is clear.
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Episode 9 - What Would Happen if There Were No Plants?
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Sat, Mar 03, 2007
Alyssa wants to know what would happen if there were no plants?
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Episode 8 - Why Do We Have Five FIngers?
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Tue, Feb 06, 2007
Bob wants to know why we have five fingers. Well, short answer, because 4 or 6 are no better than five, but, having more may change the rest of us!
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Episode 7 - Is There Life In Space?
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Sun, Jan 21, 2007
Elijah wants to know if there is life in space. Well our best hint might be to looik at volcanoes on Earth!
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Episode 6 - How Do Bees Make Honey?
Author: Dr. Dave Brodbeckask.dr.b@gmail.com (Dr. Dave Brodbeck)
Fri, Jan 05, 2007
Lucy asks how bees make honey. Dave gives her an answer, and this piece of advice, don't think about it, just enjoy it :-) My Podcast Alley feed! {pca-16fe147b77f793ba54efb9bdef213c90}
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Episode 5 - How Many FIsh Are There In The Sea
Author: Dr. Dave Brodbeckask.dr.b@gmail.com (Dr. Dave Brodbeck)
Mon, Dec 11, 2006
Dalton Boissonneau asks Dave how many sea creatures there are. Well that is hard to know, but Dave knows some scientists that study fish, and they say there are about 25 000 species. This number includes the Coelocanth, which is a great story, if an ugly fish...
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Episode 4 - Are There Really Aliens?
Author: Dr. Dave Brodbeckask.dr.b@gmail.com (Dr. Dave Brodbeck)
Thu, Nov 23, 2006
Are there really aliens?
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Episode 3 - Who Was the First Person in Space
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Mon, Nov 13, 2006
8:28 -0500,
Who was the first person in Space? Here is a hint, it was not Captain Picard or Commander Adama..
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Episode 2 - What is the Deepest Part of the Ocean?
Author: Dr. Dave Brodbeck (ask.dr.b@gmail.com)ask.dr.b@gmail.com (Dr. Dave Brodbeck)
Sun, Nov 05, 2006
What is the Deepest Part of the Ocean? Thanks to Dana Martin for the question!
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Episode 1 - Who Invented Technology?
Author: Dr. Dave Brodbeckask.dr.b@gmail.com (Dr. Dave Brodbeck)
Tue, Oct 31, 2006
Who invented technology? That is a great question to start off this new science show for kids. Here is a hint, it was not even a human!
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