Catch up TV
Series 4: 12. Window Cleaning Cradle and Shadow
Maddie heads to a tall building to find out how a window cleaning cradle works. She discovers how really strong metal cables lift and lower the cradle, which uses tracks to move around the corners of buildings. Maddie uses her special camera to see the cradle in action – and gets in herself!\n\nNext, we see how shadows are made inside using a lamp and outside using the sun. We see why shadows get shorter and longer depending on where the sun is in the sky. Maddie uses her special time lapse camera to see the shadows that the house and her toys make in the garden and how they change as the earth turns and the sun moves across the sky.
Source: CBeebies
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Most popular episodes of Do You Know?
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Series 2: 22. Hand Dryer And Toilet Roll
In today's episode, Maddie is looking at things we use when we go to the toilet. She visits a factory to see how hand dryers work. She shows us how infrared light is used to swi ...
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Series 2: 19. Television And Carpet
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Series 3: 4. Day And Night And Solar Panel
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