The Characteristics and Needs of Life

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The Characteristics and Needs of Life

• By Brianna Shields
• October 2, 2004

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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

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GOAL

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

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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

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(No Transcript)
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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

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Where does life come from?

• Spontaneous Generation Theory

• 1600s- life can spring from nonliving matter
• Redis experiment disproved this theory

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Does rotten meat turn into maggots?

• Redis 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?????

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Does rotten meat turn into maggots?

• Redis Experiment

• All jars had rotten meat
• Flies entered jar one without lid and maggots
  covered meat
• Flies couldnt penetrate lid on jar 2, therefore,
  no maggots
• Maggots crawling on net of jar 3

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Does rotten meat turn into maggots?

• Exp. Conclusion

• What is the conclusion to Redis Experiment?
• Living things will only come from the same kind
  of living thing

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Traits of Living Things

• 1. Made of Cells

• Cells only come from other cells
• Unicellular 1 cell
• Multicellular more than 1 cell

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Traits of Living Things

• 2. Can Move

• To find shelter
• Swim, run, slither, crawl, etc.
• (Even plants)

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Traits of Living Things

• 3. Metabolism

• All the breaking down and building up processes
  in the body

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Traits of Living Things

• 4. Digestion

• Breaking down food into small bits the cells can
  use

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Traits of Living Things

• 5. Respiration

• Combining oxygen and food for energy

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Traits of Living Things

• 6. Excretion

• Getting rid of waste materials

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Traits of Living Things

• 7. Grow and develop

• Grow larger
• Repair injuries
• Go through various life cycles

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Traits of Living Things

• 8. Can RESPOND to a STIMULUS

• Stimulus
• Signal/change in the environment
• Response
• Change in behavior (action) due to stimulus

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Traits of Living Things

• 9. Can change over time

• Species can adapt to the environment as it
  changes (rather than die)

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Traits of Living Things

• 10. Reproduce

• Organisms can grow and have offspring
• Asexual
• 1 parent
• Offspring are clones
• Sexual
• 2 parents
• Offspring look different from parents

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What do Living Things Need?

• 1. Energy

• Sun --gt plants --gt animals-
• used for activities

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Living Things

• 2. Food and water

• Energy and materials for growth and repair

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Living Things

• 3. Gases oxygen, carbon dioxide

• Oxygen needed by animals
• Carbon dioxide needed by plants

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Living Things

• 4. Living Space

• Limited
• Leads to competition and territory protection
• Both animals plants compete

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Living Things

• 5. Maintain homeostasis

• Ability of an organism to keep conditions inside
  body the same
• Ex Maintain homeostasis of body temperature by
  sweating

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Living Things

• Warmblooded

• Animals that maintain a constant body temperature

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Living Things

• Coldblooded

• Animals body temperatures change with changes in
  the environment

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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

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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

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Describing a Living Thing Chimpanzee

• Need energy
• Food and water- eat
• Need gas- oxygen
• Living space- habitat trees
• Maintain homeostasis warmblooded, sweating

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Homework

• Write this assignment into your agenda
• Living Things Worsheet