Concerns about effects on health have also been raised regarding the use of mobile phones-some of the risks associated with the use of mobile phones are perceived risk rather than actual. Your task is to research and draw a conclusion.

1. Understanding the Perceived Risk and Actual Risk of USING RADIATION www.sciencetutors.zoomshare.com P2

2. USING RADIATION MICROWAVE OVENS TASK To find out how microwaves causes heating Make a list of design features that make microwave ovens safe for use and explain how. www.sciencetutors.zoomshare.com

3. A microwave oven , or a microwave , is a …………………that ………..or heats……….. ..by……... …….……..This is accomplished by using ………… radiation to heat ……….. and other ………… ………….. within the food. Copy and complete the task below by using the following keywords Water microwave polarised-molecules cooks kitchen-appliance dielectric-heating www.sciencetutors.zoomshare.com

4. Dielectric heating (also known as electronic heating , high-frequency heating ) is the phenomenon in which devices like radio wave or microwave electromagnetic radiation heats a dielectric material (non conducting material) Source: Wikipedia www.sciencetutors.zoomshare.com

5. What radiations are on either side of microwave radiation in the electromagnetic spectrum? www.sciencetutors.zoomshare.com

6. Why does microwave and radio radiation not have any ionizing effect? www.sciencetutors.zoomshare.com

8. Explain why the walls and door of a microwave oven are designed to reflect microwave radiation? www.sciencetutors.zoomshare.com