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HOME PLANET
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PROGRAMME INFO |
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Richard Daniel chairs the interactive environmental programme in which he and his guests deal with listener's questions and concerns.
Call 0370 010 0400
home.planet@bbc.co.uk
ÃÛÑ¿´«Ã½ Planet, PO Box 3096, Brighton BN1 1PL |
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LISTEN AGAIN 30 min |
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| | PRESENTER | | | |
|  | | | | "ÃÛÑ¿´«Ã½ Planet is the environmental programme for which you set the agenda. We tackle your questions and concerns and try and make some sense out of the conflicting opinions which make up the environmental debate."
Richard Daniel | | | | |
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PROGRAMME DETAILS |
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Panel
TOPICS
Where does space start?
Can you see the Great Wall of China from Space?
Given the different speeds, mass and trajectory of objects hitting the moon - why are its craters all a similar shape?
Philip Stott's experiment:
You are testing the null hypotheses that there is no difference in the basic form of craters produced by (i) different-sized peas
('meteorites'), (ii) different-shaped peas, and (iii) peas hitting the surface at different angles and speeds;
(a) Take one large, dry tea cup or bowl;
(b) Fill it to nearly full with plain flour, add very little water and mix - just sufficient water so that the flour will hold its form
when turned out of the cup. The surface should still be 'dusty';
(c) Place a plate over the open end of the cup and tip it up gently so that a 'moon hemisphere' is positioned on the plate;
(d) Gently compact and make smooth the surface;
(e) Select a range of frozen peas of different sizes and shapes;
(f) Take one pea (Pea A). Note its size, shape, and weight, and then aim it at the 'moon's surface': (i) at different angles (including
skimming the surface) and (ii) at different speeds;
(g) Record the shapes, sizes, and depths of each crater produced by Pea A;
(h) Smooth the surface again, and repeat for peas (B), (C,) etc., of different sizes and shapes;
(i) With the last pea (X), don't smooth the surface before using it so that you can look at the impact of a craters formed on craters;
(j) Now, compare and contrast all your results and assess the degree to which the null hypotheses must be replaced by alternative hypotheses.
Impact craters on earth
Geo-Thermal Energy
Loss of earth's hydrogen into outer space
Pluto
Contact ÃÛÑ¿´«Ã½ Planet
Send your comments and questions for future programmes to:
ÃÛÑ¿´«Ã½ Planet
ÃÛÑ¿´«Ã½ Radio 4
PO Box 3096
Brighton BN1 1PL
Or email the programme: home.planet@bbc.co.uk
Or telephone the Audience Line 03700 100 400
ÃÛÑ¿´«Ã½ Planet is a Pier Production for ÃÛÑ¿´«Ã½ Radio 4 and is produced by Nick Patrick.
The personal information you provide will be held by the ÃÛÑ¿´«Ã½ and by Pier Productions Ltd, the independent production company which makes ÃÛÑ¿´«Ã½ Planet. Your information will be used for the purpose of creating the ÃÛÑ¿´«Ã½ Planet programme, and will be processed in accordance with the Data Protection Act 1998. For more details on how the ÃÛÑ¿´«Ã½ deals with your information, please see the ÃÛÑ¿´«Ã½â€™s at
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