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You are taking a group of people to the arctic. Design an experiment, which will enable you to choose the best lining material for jackets to wear.
Member rating: No Rating | Words: | Submitted: Sun Dec 15 2002
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INVESTIGATION: You are taking a group of people to the arctic. Design an experiment, which will enable you to choose the best lining material for jackets to wear. BACKGROUND KNOWLEDGE: The environment of a living organism is always changing. Think about your own environment. The temperature of the air around you changes e.g. it can be -10oc outside and 23oc indoors. The cells inside your body, however, do not have to put up with a changing environment. Your body keeps the environment inside your body almost the same all the time. This is called homeostasis. This is very important. It helps your cells to work as efficiently as possible. When your body drops below 37oc, messages from the hypothalamus cause your skin to cut down the rate of heat loss. Firstly your hairs stand on end, which on an animal is very effective as lots of air pockets are formed, but...
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