Like dinosaurs, if humansdon’t meet their needsthey also will become extinct
So what do humans, like us-- you and me--need to survive? What must we have inorder to continue living?We are not talking about your dog or cat, oryour computer games or cell phone.We are talking about those really importantthings you must have if you are to continueliving (things that would cause you to die ifyou didn’t have them).
Let’s think of some of those things. First,pinch your nose tightly and try holding yourbreath as long as you can.What happens? How long couldyou stay alive without breathing?So, what then is one ofthe things in nature weneed to survive?Yes, oxygen --without the oxygenin air we would quickly die.
•The air around us has many different gases including oxygen and carbon dioxide. •We need some of that oxygen from the air in order to survive (live).•Plants need carbon dioxide from the air tomake their food. (Important because theenergy stored in plants comes to us as foodthrough the food chain.)
This is an animation that http://www.dillpickletheater.com/cj/flash_gall helps explain the exchange ery/web_pages/gas.htm of gases that takes place between plants and animals.So air is one of those “things” that we musthave in order to live and... air is part of:
Something else we maynotice at school justbefore lunch time, isthat we arehungry.Along with oxygenand water, humansneed to have food.It seems that most humans can survive up to30-40 days without any food, so long as theyhave air and enough water to drink.
So there are at least three things that wemust have to survive, air, water and food.So far we discovered that air and watercome from nature, but what about food?Maybe we know that food comes from thestore, but where did it come from before itgot to the store? Food for thought?
Let’s think about where allthe stuff we eat comesfrom?
What is cotton?Cotton is a plant that grows all over the worldincluding Texas.
Harvestingcotton Cotton plant Raw bales of cotton Field of cotton Bale of cotton
Raw cotton can be changed into cottonthread which is then woven into cotton fabricand made into clothing. Raw cotton to cotton thread
People who live in coldclimates often wearwool socks, sweatersand coats.
Wool comes from sheep. Man shearing Sheep sheepA shornsheep Sheep wool
Raw wool can be changed into wool yarnwhich is used to knit wool clothes.
Many of ourshirts,jackets,socks andshorts aremade out ofpolyester ornylon.
Polyester or nylon clothes are made fromcrude oil. crude oil Crude oil is a yellowish black liquid found underground. It gives off a very strong smell or odor.
Crude oil can be changed into polyesterthread which is then used to make clothes.
What is Crude Oil and How was it Formed?Animal and plant remains are a large part of oil.The animals and plants lived in oceans 300-400million years ago. As these remains were coveredby mud, heat and pressure helped to change theseremains into crude oil.
Sometimes our clothes are not purecotton, pure wool or pure polyester ornylon.Like these sockswhich are madeup of 80% cottonthreads and 20%polyester thread.
Some of ourclothes may bemade our of all(100%) cotton.Some of ourclothes may bemade our of all(100%) polyester. Some are made of some polyester or nylon and some cotton or some polyester or nylon and wool.