2. 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

3. Aim#13: Why is chemistry so important to biology? Chemistry is the study of matter What is Chemistry?

4. What is matter? Matter is anything that occupies space and has mass.

5. 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.

6. What are the chemical building blocks? Elements Compounds Atoms

7. 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.

8. Who can give some examples of elements? Gold Sodium Helium

9. 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

10. 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

11. 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.

12. 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.

13. Brain Pop: Atoms https://www.brainpop.com/science/matterandchemistry/atoms/

14. 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.

15. Atoms P N Nucleus (protons and neutrons) Electrons

16. When atoms bond together they are called…… MOLECULES Join

17. 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

18. Meet the Elements https://www.youtube.com/watch?v=d0zION8xjbM