5th Grade Ch. 4 Lesson 4 How do Plants Grow

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5th Grade Ch. 4 Lesson 4 How do Plants Grow

  1. 1. Ch. 4 Lesson 4 How do plants grow?
  2. 3. “ mile a minute plant” -can grow up to 1 foot per day
  3. 4. tropisms <ul><li>ways that plants change their direction of growth in response to environment </li></ul>
  4. 5. gravi tropism <ul><li>roots grow downward b/c of gravity </li></ul>
  5. 6. photo tropism <ul><li>plant’s reaction to light </li></ul><ul><li>stem grows toward light </li></ul>
  6. 7. thigmo tropism <ul><li>plant’s growth in response to touch ing an object </li></ul>
  7. 8. growth hormone <ul><li>chemical that affects plant growth </li></ul><ul><li>can make cells grow larger </li></ul><ul><li>cells may also look larger b/c vacuoles fill w/ water </li></ul>
  8. 9. gravitropism Name that tropism!
  9. 10. Name that tropism! phototropism
  10. 11. Name that tropism! phototropism
  11. 12. Name that tropism! phototropism & gravitropism
  12. 13. Name that tropism! thigmotropism
  13. 14. Tropisms in our neighborhood Plant name Location Type of tropism Sketch or describe tropism

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