Is It Alive?  Characteristics of   Living Things         &   Necessities of        Life
Characteristics of Living            Things   What makes something    living or nonliving?   Is a rock living? What    a...
#1: Living Things Have Cells   All living things are    composed of one or    more cells   What is a cell? A cell    is ...
#2: Living Things Sense and        Respond to Change   A stimulus is a change that affects the activity of an    organism...
Homeostasis is kind of like a see-saw, which your body wants to keep                              balanced.        -Outsid...
#3: Living Things Reproduce   Sexual reproduction:    two parents produce    offspring that is similar    to both parents...
#4: Living Things Have DNA    The cells of ALL living     things contain the     molecule     “deoxyribonucleic acid,    ...
#5: Living Things Use Energy   Organisms need and use energy to carry out    activities in life   Metabolism: the total ...
#6: Living Things Grow and                  Develop   We all GROW! It doesn’t    matter if you are a multicellular    or ...
Necessities of Life Organisms   need 4 things to live:  Water   Your body is made up of 70 %    water   Most of the ch...
   Air    A mixture of gases (oxygen and     carbon dioxide)    Organisms on land get oxygen     from the air    Marin...
   Food     Gives us energy and raw materials      needed to carry on life processes such      as replacing cells     P...
5 Building Blocks of Cells 1) Proteins:  Molecule made up  of amino acids;  helps build and  repair body  structures.  Ex...
   2) Carbohydrates:    molecules made up of    sugar     A) Simple      carbohydrates: one      sugar molecule, like   ...
 3) Lipids: do not  dissolve in water;  include fats and  steroids A) phospholipids are  the molecules that  form much o...
 4)ATP: “Adenosine Triphosphate”; major energy- carrying molecule in the cell; provides energy for the cell
 5)Nucleic Acids: have all the information a cell needs to make proteins; DNA is a nucleic acid
 Shelter  (a place to live)  All living   things need   a place to   live that has   all of the   necessities   of life ...
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Char of lv things & necess of life

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Char of lv things & necess of life

  1. 1. Is It Alive? Characteristics of Living Things & Necessities of Life
  2. 2. Characteristics of Living Things What makes something living or nonliving? Is a rock living? What about a piece of grass? Or an icicle?  There are 6 characteristics of living things
  3. 3. #1: Living Things Have Cells All living things are composed of one or more cells What is a cell? A cell is a membrane- covered structure that contains all the material necessary for life Unicellular = one cell; multicellular = more than one cell
  4. 4. #2: Living Things Sense and Respond to Change A stimulus is a change that affects the activity of an organism. -Examples: chemicals, gravity, light, sound, hunger, or anything else that activates a response Homeostasis is the maintenance of a stable internal environment  Allows us to keep our internal environment in check when external environment is changing  Example: When it gets cold outside, our internal temp still stay 98.6 degrees
  5. 5. Homeostasis is kind of like a see-saw, which your body wants to keep balanced. -Outside temp is cold, but our bodies don’t plunge into a low body temp—it works hard to balance our temp at 98.6 degrees, no matter what the outside weather!
  6. 6. #3: Living Things Reproduce Sexual reproduction: two parents produce offspring that is similar to both parents Asexual reproduction: single parent produces offspring that is identical to the parent
  7. 7. #4: Living Things Have DNA  The cells of ALL living things contain the molecule “deoxyribonucleic acid, or DNA  DNA controls structure and function of the cells  Heredity: passing copies of DNA from parent to offspring
  8. 8. #5: Living Things Use Energy Organisms need and use energy to carry out activities in life Metabolism: the total of all the chemical activities that the organism performs
  9. 9. #6: Living Things Grow and Develop We all GROW! It doesn’t matter if you are a multicellular or unicellular organism We all develop! As we grow, we go through different stages in our lives.  Example: US! Baby->child->teen- >adult  Acorn  seedling  sapling  tree
  10. 10. Necessities of Life Organisms need 4 things to live:  Water Your body is made up of 70 % water Most of the chemical reactions involved in metabolism require water
  11. 11.  Air A mixture of gases (oxygen and carbon dioxide) Organisms on land get oxygen from the air Marine animals get dissolved oxygen from the water or by coming up for air Green plants, algae, and some bacteria need carbon dioxide in addition to oxygen to undergo their food making process called photosynthesis
  12. 12.  Food  Gives us energy and raw materials needed to carry on life processes such as replacing cells  Producers: make their own food  Consumers: get food by eating other organisms  Decomposers: break down nutrients of dead organisms or animal wastes
  13. 13. 5 Building Blocks of Cells 1) Proteins: Molecule made up of amino acids; helps build and repair body structures. Example: protein hemoglobin is in red blood cells and binds to oxygen to deliver it throughout the body
  14. 14.  2) Carbohydrates: molecules made up of sugar  A) Simple carbohydrates: one sugar molecule, like table sugar  B) Complex carbohydrates: hundreds of sugar molecules, such as plants (potato, whole wheat)
  15. 15.  3) Lipids: do not dissolve in water; include fats and steroids A) phospholipids are the molecules that form much of the cell membrane; the head is attracted to water but the tail is not—the tails attract to form two layers
  16. 16.  4)ATP: “Adenosine Triphosphate”; major energy- carrying molecule in the cell; provides energy for the cell
  17. 17.  5)Nucleic Acids: have all the information a cell needs to make proteins; DNA is a nucleic acid
  18. 18.  Shelter (a place to live)  All living things need a place to live that has all of the necessities of life (enough space, food, water, etc)

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