1 / 17

PHOTOSYNTHESIS & AUTUMN LEAVES

Explore why leaves change color in autumn and the process of photosynthesis in middle school science with Mrs. Figoten. Discover why deciduous forests experience this phenomenon and the pigments involved. Learn about chlorophyll, carotene, anthocyanin, and more!

lmarlene
Télécharger la présentation

PHOTOSYNTHESIS & AUTUMN LEAVES

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. PHOTOSYNTHESIS & AUTUMN LEAVES Middle School Science Mrs. Figoten

  2. DO LEAVES ON TREES IN ALL BIOMES CHANGE COLOR? Leaves change color seasonally only in deciduous forests.

  3. Warm summers & cold winters 50+ cm precipitation/yr Trees shed leaves yearly WHY ONLY IN DECIDUOUS FORESTS?

  4. AUTUMNLEAFCHANGES What signals leaves to change color in autumn? • Earth’s tilt changes in Northern Hemisphere • Less daylight,cooler temperatures

  5. AUTUMNLEAFCHANGES What causesleafcolor? • 3 pigments in each leaf- the amount in each leaf varies • Chlorophyll • Carotene • Anthocyanin

  6. LEAF PIGMENT: CHLOROPHYLL • Leaf appears green • Present in leaf membrane • Needs sunlight in order to make food for tree through photosynthesis

  7. LEAF PIGMENT: CAROTENE • Leaf appears yellow • Remains in leaf membrane as chlorophyll disappears • Helps with photosynthesis • Birch & Hickory leaves have lots of carotene

  8. LEAF PIGMENT: ANTHOCYANIN • Leaf appears red/purple • Present in cell sap • Reacts with sugar from photosynthesis • In some trees, sugar in leaves increasesin autumn • Red Maple, Red Oak & Sumac leaves have lots of anthocyanin

  9. WHAT IS PHOTOSYNTHESIS?

  10. WHAT DO PLANTS NEED FOR PHOTOSYNTHESIS?

  11. xxxxxxxxxxx

  12. DOES ANYTHING ELSE MAKE ITS OWN FOOD USING PHOTOSYNTHESIS?

More Related