MAKE A PREDICTION How does camouflage affect survival rates?

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# MAKE A PREDICTION How does camouflage affect survival rates? - PowerPoint PPT Presentation

MAKE A PREDICTION How does camouflage affect survival rates?. http://animals.pppst.com/banner_camouflage.gif. Animal Camouflage. Hypothesis: Write your prediction here. How does camouflage affect survival rates? Purpose: To view the effects of animal camouflage on natural selection.

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MAKE A PREDICTION

How does camouflage affect survival rates?

http://animals.pppst.com/banner_camouflage.gif

Animal Camouflage
• Hypothesis: Write your prediction here. How does camouflage affect survival rates?
• Purpose: To view the effects of animal camouflage on natural selection.
• Materials: black beads, colored beads, 1 multicolored container with lid, 1 black and white container with lid, data sheet, pencil or pen.
Procedure:
• Count out 50 black beads and place in container
• Count out 50 “other” color beads and place in container
• Fill in the “AT START” columns on your data sheet.

PERCENT OF TOTAL = ___# of beads__ X 100 total beads in box

### FEEDING RULES

4. Look into container and pick 1 bead.

Keep your eyes OPEN!

Pick the FIRST ONE you SEE!

NO picking your favorite color!

Only pick ONE AT A TIME!

5. Shake, choose, repeat until you remove 20 beads.

http://www.feebleminds-gifs.com/ani5.html

AFTER 1ST FEEDING
• Calculate number of black beads IN BOX

7. Calculate number of “other” color beads IN BOX

8. Fill in “AFTER 1ST FEEDING” column on data sheet.

PERCENT OF TOTAL = ___# of beads_ X 100 total beads in box

http://pro.corbis.com/images/42-18867237.jpg?size=67&uid=%7B21E60102-7098-4CA2-B76E-6ACC29D9CA18%7D

REPRODUCE

9. Number of black beads in box ÷ 2

Add this many black beads to box

10. Number of “other” color beads in box ÷ 2

Add this many “other” color beads to box

(repeat step 9 using colored beads)

Round UP for odd numbers of beads.

11. Fill in “AFTER 1st REPRODUCTION” column on data sheet.

### 12. FEED AGAIN

Keep your eyes open!

Pick the FIRST ONE you SEE!

NO picking your favorite color!

Only pick ONE at a time!

Shake, choose, repeat until you remove 20 beads.

http://www.feebleminds-gifs.com/ani5.html

• Calculate number of black beads IN BOX
• Calculate number of “other” color beads IN BOX
• Fill in “AFTER 2nd FEEDING” column on data sheet.

PERCENT OF TOTAL = ___# of beads_ X 100 total beads in box

http://pro.corbis.com/images/42-18867237.jpg?size=67&uid=%7B21E60102-7098-4CA2-B76E-6ACC29D9CA18%7D

14. REPRODUCEAGAIN

Number of black beads in box ÷ 2

Add this many black beads to box

Number of “other” color beads in box ÷ 2

Add this many “other” color beads to box

Round up for odd numbers of beads.

Fill in “AFTER 2nd REPRODUCTION” column on data sheet.

FILL IN CLASS DATA SHEETon projector with your group’s dataCopy the class data onto YOUR Class data sheet