Classification Unit Test Monday and Tuesday Get out your notes and begin review

CRCT Practice September 17, 2014 Leaf cells use chlorophyll to absorb Oxygen Light energy Carbon dioxide glucose

NOTES, September 17, 2014 Atoms are the smallest particle of all matter. Elements are a type of matter where all the atoms are the same. Elements can not be broken down. Example: hydrogen or oxygen A compound is when two or more elements are chemically combined. Example: 6H₂O A molecule is the smallest part of a compound. H₂O

Four large molecules that support cell function: Carbohydrates-give energy Lipids-fats, oils, waxes found in living things Proteins-made of amino acids; enzymes are types of proteins that control chemical reactions

4. Nucleic Acids-molecules that hold the instructions for the maintenance, growth, and reproduction of a cell (DNA and RNA)

36. Organic compounds-compounds found in all living things in nature 36. Organic compounds-compounds found in all living things in nature. Only living(or once living) organisms can contain organic compounds. Hint: look for the element carbon (C ) 37. Inorganic compounds-compounds found in all nonliving things in nature.

CRCT Practice September 18, 2014 The cells of a redwood tree require oxygen for the process of Photosynthesis Cellular respiration Fermentation Binary fission

Notes September 18, 2014 Cells must: Get materials they need into the cell Get rid of waste products in the cell Have chemical reactions in the cell

Vocabulary 38. homeostasis- “balanced”; the number of molecules inside a cell are the same as the number of molecules outside the cell 39. diffusion-the movement of molecules across a cell membrane(in or out of cell)

40. osmosis- a type of diffusion; moves ONLY water molecules across the cell membrane 41. active transport-the movement of molecules in or out of a cell when the cell uses energy

42. passive transport-the movement of molecules in or out of a cell WITHOUT the cell using energy (diffusion and osmosis)

Reading pages 56-60; guided

CRCT Practice September 19, 2014 Both a whale and a seaweed use which of the following to change glucose into energy? Water Photosynthesis Cellular respiration Bonding

Notes 9/17/14 Chemical energy is provided to all cells as glucose. Water is needed for all chemical reactions in a cell. Osmosis is a special type of diffusion. Osmosis only moves water molecules in and out of a cell. This is because cells need so much water. (passive)

Diffusion is a type of passive transport that moves molecules in or out of cell ( carbon dioxide, oxygen…) Active transport moves molecules but Must use some the cell’s energy to do This. Salt moves across a cell’s membrane this way.

Diffusion of carbon dioxide

Osmosis- WATER ONLY

CRCT Practice September 18, 2014 The process by which water moves across a cell membrane is Diffusion Active transport Osmosis Facilitated diffusion

Practice with osmosis and diffusion