P1 0.0 / 5 ? PhysicsGCSEOCR Created by: LaurenCreated on: 09-04-13 11:03 What does the ozone layer protects us from? UV Radiation 1 of 20 What is the Ozone? a molecule made of three oxygen atoms 2 of 20 What does the ozone do? Absorbs some of the UV rays from the sun 3 of 20 Describe how we are ruining the ozone layer Pollution from CFC's 4 of 20 What does Ultraviolet Radiation cause skin cancer 5 of 20 What is infrared? energy transfer by electromagnetic waves 6 of 20 Finish the sentence- Hotter an object the more infrared radiation it ..... in a given time emits 7 of 20 Name some of the electromagnetic spectrum radio waves, microwaves, infrared radiation, visible light 8 of 20 What are electromagnetic waves? electric and magnetic waves that travel through space 9 of 20 Finish sentence- the sun emits ....................................................... all types of electromagnetic radiation 10 of 20 What does the atmosphere block out? radiation 11 of 20 What does'nt the atmosphere block out? infrared radiation 12 of 20 The microwaves penetrate up to a few into food before being absorbed by ..... water molecules 13 of 20 Energy from what causes the food to heat up? microwaves 14 of 20 What then happens to the heat energy conducted or convected to other parts of the food 15 of 20 What are lasers? narrow beam of light 16 of 20 Wat are digital signals? series of pulses with 2 states 17 of 20 What are the 2 states fo digital signals? on/off 18 of 20 Light can be used for what? digital communication 19 of 20 What can optical fibres do? carry information coded on light waves ir infrared waves 20 of 20
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