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  • Level: GCSE
  • Subject: Science
  • Document length: 1974 words

Chemical Reactions in the Kitchen

Extracts from this document...

Introduction

Chemistry One World Chemical reactions are all around us. Every day, we experience chemical changes. Most of them occur in the kitchen although we don't really know it or think about it. These examples are cooking eggs, making cake, cooking rice, burning toast, and baking a potato. However other chemical reactions that take place during everyday life include burning wood and lighting a match. We rely on chemical changes to survive. The clothes we wear and the food we eat are the results of chemical changes. There are millions of chemical changes going on around us. Some are even happening in our body. Plants use energy from the Sun to combine water and carbon dioxide, which react to form sugar and Oxygen. When we eat these plants and breathe in oxygen from the air, the sugar and oxygen react in our cells to produce water, carbon dioxide, and energy. We need the energy from this reaction for our daily activities. The Chemical reaction that I chose to do a report on is frying an egg. The chemical reaction/change taking place is the making of the fried egg. When we fry an egg, we are changing its physical composition. The clear, liquid part of the egg changes color and becomes solid. The cooked egg has properties that are different from the properties of the uncooked egg. This process becomes irreversible and we cannot return the egg back to its previous state. ...read more.

Middle

Thus, it will absorb heat a lot slower. Therefore, a smaller surface area would mean that the egg would cook slower. Science is applied to addressing the issue of hunger, which in my case, I would like to relate to lack of hunger. Having an eating disorder is usually a reason for lack of hunger or not eating enough. It is an obsession with food and weight that harms a person's health. One very common and major eating disorder is anorexia nervosa. People with anorexia are obsessed with being thin. They refuse to eat, and are afraid of gaining weight. Most people with this eating disorder take diet pills, laxatives or water pills to lose weight. Science and scientists have created diet pills which they believe help people lose weight. Many people believe this because of the pressure the media has put on them, making them believe that the best way to live is by being slim, thin and fit and so they fight to become this. Most common diet pills either increase your metabolism in order to reduce appetite or burn extra calories. Although some people find diet pills to be very useful and completely harmful, most scientists have discovered the dangers, limitations and side effects of these pills. The side effects of some diet pills as shown by medical testing are that they cause nervousness, restlessness, insomnia, high blood pressure, fatigue and hyperactivity, heart failure or heart attack, headaches, dry mouth, vomiting, diarrhea and hair loss. ...read more.

Conclusion

These pests also harm people with their bites or stings and so in order to keep crops growing and to produce food we are forced to kill these insects for a better health. Pesticides are also one of the causes of water pollution. Another chemical that science has created is herbicides. Herbicides are a type of pesticide used to kill unwanted plants. They kill particular objects, and keep the plants unharmed. They affect certain pathways and systems found only in plants, and so it is one of the safest crop protection products having no effect on mammals, birds, amphibians or reptiles. However, some herbicides can cause a variety of health effects from skin rashes to death. If it comes in direct contact with humans it will be toxic to your liver, kidneys, and nervous system. It will cause headaches, weakness, thirst, sweating, and a feeling of overall illness. Therefore, you need to use these chemicals created for us by science wisely and carefully. In conclusion, science is a very important part of our daily life. Although most of us don't really notice it, science has affected the usual everyday activities we carry out daily. It does this in positive and negative ways. Science and its applications influence and have an effect on the social, economic, political, environmental, cultural and ethical factors that we as humans work with everyday. Science has made life for us a lot easier and safer. Although some negative affects of science lead to severe illnesses and death, it can be prevented. Resources: http://cholesterol.about.com/cs/controlwithdiet/a/egg.htm http://weightlossinternational.com/newsletter/diet-pills.html http://familydoctor.org/online/famdocen/home/children/teens/eating/277.html http://peer.tamu.edu/curriculum_modules/Environ_Hazard/module_4/lesson2.htm ?? ?? ?? ?? Ariej Al-Banwan Science ...read more.

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