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Drill6 October 2011
What are little boys made of?“Snips and snails, and puppy dogs tailsThat's what little boys are made of !"
What are little girls made of?"Sugar and spice and all things niceThat's what little girls are made of!“
19th century Mother Goose Rhyme
What substances are you really made of? Make a list.
Benjamin
Objectives
At the conclusion of this lesson students will be able to:
1. Define the term matter.2. Identify the 25 most common
elements in living things and categorize them into major and trace groupings.
3. Demonstrate how to find information about elements by using the periodic table.
Matter!
Matter is anything that occupies space and has mass.
Will this astronaut occupy the same space on the moon as he does on Earth?Will this astronaut weigh the same on the moon as he does on the Earth?
Mass and weight are not the same.
Obj. 1
Living Things Matter!
• All living things are made of matter.• Elements are substances that
cannot be broken down chemically into simpler kinds of matter.
Can you give some examples of elements?
Majorly Elemental!
• There are about 25 elements that are essential to all life.
• To discover them do the following:
1. Mr. Bromwell will give you a sheet listing the chemical symbols of the 25 elements essential to all life.
2. First look up the names of each of the elements in the periodic table.
3. Next, decide which elements belong to the eleven major elements in the human body. Then in the space provided, place the names of these elements in order from most abundant to least abundant in the body.
4. When you have finished place your answers on the chalkboard.
1. Mr. Bromwell will give you a sheet listing the chemical symbols of the 25 elements essential to all life.
2. First look up the names of each of the elements in the periodic table.
3. Next, decide which elements belong to the eleven major elements in the human body. Then in the space provided, place the names of these elements in order from most abundant to least abundant in the body.
4. When you have finished place your answers on the chalkboard.
The Elemental Body --The Major Elements
Rank
Chemical
Symbol
Element% of
human body*
1 O Oxygen 62 %
2 C Carbon 23 %3 H Hydrogen 10 %4 N Nitrogen 2.6 %5 Ca Calcium 1.4 %6 P Phosphorus 1.1 %7 K Potassium 0.2 %8 S Sulfur 0.2 %9 Na Sodium 0.1%10 Cl Chlorine 0.1 %11 Mg Magnesium 0.02 %* Based on an average 70 kg (154 lbs.) person
Obj. 2
A major element is any element that makes up more than 0.01% of your body mass.
The Elemental Body --The Trace Elements
A trace element is any element that makes up less than 0.01% of your body mass, but is still critical to your health.
Rank
Chemical
Symbol
Element
12 Fe Iron13 F Fluorine14 Zn Zinc15 Si Silicon16 Cu Copper17 I Iodine18 Sn Tin
Rank
Chemical
Symbol
Element
19 B Boron20 Se Selenium21 Cr Chromium22 Mn Manganese
23 Mo Molybdenum
24 Co Cobalt25 V Vanadium
Homework
• Research one of the trace elements from the previous table. Answer the following questions in a paragraph:– What materials or chemicals in the
body contain this element?– From what foods might your body
obtain this element?– Why is this element essential
(necessary) for the human body to function?
Time to Research
Glossary – Part 1
matter – anything that occupies space and has mass
mass – quantity of matter an object has
element – a substance that cannot be broken down chemically into simpler substances
atom – simplest particle of an element that retains all of the properties of that element
compound – a substance containing atoms of two or more elements that are chemically combined in fixed proportions
trace element – an element that makes up less than 0.01% of your body mass
Glossary – Part 2
organic compound – a compound that contains the element carbon
orbitals – a three-dimensional region around a nucleus that indicates a probably location of an electron
isotopes – atoms of the same element that have a different number of neutrons
chemical bonds – attractive forces that hold atoms together
Works Cited
Campbell, Neil A., Brad Williamson, and Robin J. Heyden. Biology: Exploring Life. Upper Saddle River, NJ: Pearson Education, 2004.
Emsley, John. The Elements. 3rd. Oxford: Clarendon Press, 1998.
Postlethwait, John H., and Janet L. Hopson. Modern Biology. Austin, TX: Holt, Rinehart and Winston,
2006.