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Date: October 6, 2015 Aim #13: Why is chemistry so important to biology? HW: 1)Worksheet- Understanding Chemical Formulas 2)Crickets Lab due Wednesday 10/7 3)Textbook Guided Reading 2-1 due Tuesday 10/13 Do Now: Warm-Up Notebook DateTitle of ActivityPage # 10/6Self-Assessment: Intro to Chem25
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Aim#13: Why is chemistry so important to biology? Chemistry is the study of matter What is Chemistry?
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What is matter? Matter is anything that occupies space and has mass.
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Why do we need to study chemistry in a biology class? All living things are made up of matter, share the chemical building blocks, and depend on chemical processes for survival.
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What are the chemical building blocks? Elements Compounds Atoms
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What are elements? An element is a pure substance that cannot be broken down into other substances by chemical means. Periodic Table- is a list of around 100 elements that are found on earth.
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Who can give some examples of elements? Gold Sodium Helium
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About 25 elements are essential to life Oxygen (O), Carbon (C), Hydrogen (H), & Nitrogen (N) make up about 96% of the living matter in your body
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Important Element Symbols: H (Hydrogen) Cl (Chlorine) N (Nitrogen) Ca (Calcium) O (Oxygen) K (Potassium) C (Carbon) Na (Sodium) Each element is represented by a symbol made up of one or two letters. **Note: If a symbol is two letters, only the first letter is capitalized
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What are compounds? + Cl Salt Compound- is a substance containing two or more elements that are chemically combined in a fixed ratio. A compound’s properties may differ greatly from those of its component elements.
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What is an atom? Atom- is the smallest possible particle of an element. Gold A piece of gold, is made up of only one type of atom (gold atoms). Billions of gold atoms.
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Brain Pop: Atoms https://www.brainpop.com/science/matterandchemistry/atoms/
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What are atoms made up of? Protons- subatomic particles with a positive electrical charge (+) Electrons- subatomic particles with a negative electrical charge (-) Neutrons- subatomic particles that are electrically neutral. An element’s physical and chemical properties depend on the number and arrangement of these particles.
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Atoms P N Nucleus (protons and neutrons) Electrons
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When atoms bond together they are called…… MOLECULES Join
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How do we write chemical compounds/molecules using symbols? What is H 2 0? How many hydrogen atoms in 1 molecule of water? 2 How many oxygen atoms in 1 molecule of water? 1
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Meet the Elements https://www.youtube.com/watch?v=d0zION8xjbM
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