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The Characteristics and Needs of Life

The Characteristics and Needs of Life. By: Brianna Shields October 2, 2004. DO NOW. 1. Identify the IV and DV: If I use a higher temperature then the food will cook faster. 2. Is a rock living or nonliving? 3. What is the smallest living unit or part in your body ?

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The Characteristics and Needs of Life

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  1. The Characteristics and Needs of Life By: Brianna Shields October 2, 2004

  2. DO NOW • 1. Identify the IV and DV: If I use a higher temperature then the food will cook faster. • 2. Is a rock living or nonliving? • 3. What is the smallest living unit or part in your body ? • Get your current event homework out- place it on your desk

  3. GOAL • To determine the characteristics of life • To figure out what living things need to survive

  4. Video • Write the statement below across the top of your notebook paper: • “ALL LIVING THINGS………….” • Watch the video and list all 9 common characteristics of living things

  5. ALL LIVING THINGS……. • 1. Are made from same basic chemical ingredients • 2. Are composed of cells • 3. Require water & source of energy • 4. Have the ability to reproduce & grow • 5. Have limited lifespans • 6. Can respond to their surroundings • 7. Have the ability to move • 8. Are able to repair injuries • 9. Can change over time

  6. Spontaneous Generation Theory 1600’s- life can spring from nonliving matter Redi’s experiment disproved this theory Where does life come from?

  7. Redi’s Experiment 6 jars with meat 2 uncovered 2 sealed tightly w/ a lid 2 covered with netting Flies let into room What did they find????? Does rotten meat turn into maggots?

  8. Redi’s Experiment All jars had rotten meat Flies entered jar one without lid and maggots covered meat Flies couldn’t penetrate lid on jar 2, therefore, no maggots Maggots crawling on net of jar 3 Does rotten meat turn into maggots?

  9. Exp. Conclusion What is the conclusion to Redi’s Experiment? Living things will only come from the same kind of living thing Does rotten meat turn into maggots?

  10. 1. Made of Cells Cells only come from other cells Unicellular= 1 cell Multicellular= more than 1 cell Traits of Living Things

  11. 2. Can Move To find shelter Swim, run, slither, crawl, etc. (Even plants) Traits of Living Things

  12. 3. Metabolism All the breaking down and building up processes in the body Traits of Living Things

  13. 4. Digestion Breaking down food into small bits the cells can use Traits of Living Things

  14. 5. Respiration Combining oxygen and food for energy Traits of Living Things

  15. 6. Excretion Getting rid of waste materials Traits of Living Things

  16. 7. Grow and develop Grow larger Repair injuries Go through various life cycles Traits of Living Things

  17. 8. Can RESPOND to a STIMULUS Stimulus Signal/change in the environment Response Change in behavior (action) due to stimulus Traits of Living Things

  18. 9. Can change over time Species can adapt to the environment as it changes (rather than die) Traits of Living Things

  19. 10. Reproduce Organisms can grow and have offspring Asexual 1 parent Offspring are clones Sexual 2 parents Offspring look different from parents Traits of Living Things

  20. 1. Energy Sun --> plants --> animals- used for activities What do Living Things Need?

  21. 2. Food and water Energy and materials for growth and repair Living Things

  22. 3. Gases: oxygen, carbon dioxide Oxygen needed by animals Carbon dioxide needed by plants Living Things

  23. 4. Living Space Limited Leads to competition and territory protection Both animals & plants compete Living Things

  24. 5. Maintain homeostasis Ability of an organism to keep conditions inside body the same Ex: Maintain homeostasis of body temperature by sweating Living Things

  25. Warmblooded Animals that maintain a constant body temperature Living Things

  26. Coldblooded Animals body temperatures change with changes in the environment Living Things

  27. Pyramid Assessment • 1. One word to describe how the body maintains balance • 2. Two types of reproduction • 3. Three things (substances) all living organisms need • 4. Four things all living organisms have in common • 5. Five things that are considered living

  28. Describing a Living Thing: Chimpanzee • Unicellular • Can freely move about • Metabolism • Digestion- eat: • Respiration- breathe in oxygen, combines w/ food • Excretion- defecates, sweats • Grow and develop- injuries heal • Respond to stimuli- responds to communication from other chimps • Change over time- hands adapted for life in trees • Reproduce- sexually

  29. Describing a Living Thing: Chimpanzee • Need energy • Food and water- eat: • Need gas- oxygen • Living space- habitat: trees • Maintain homeostasis: warmblooded, sweating

  30. Homework • Write this assignment into your agenda: • “Living Things Worsheet”

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