Numbers That Do Not Match: teacher key

Philippine Eagles, grade 9 edition, written for 9th grade. Sources disagree about how many Philippine eagles there are, how wide their wings reach and when young eagles leave the nest. See how scientists study a bird that is hard to find.

Read the book. Print this page for the key.

Questions and answers

1. How high were the observation posts that scientists built?
   • Up to 31 meters (answer)
   • Up to 3 meters
   • Up to 310 meters
2. Where do tracked eagles forage mostly?
   • Inside old-growth forest
   • Over the sea
   • Outside old-growth forest (answer)
3. What share of the incubating do females do?
   • About two-thirds (answer)
   • About one-tenth
   • None
4. What does forest fragmentation mean?
   • Forest grows faster
   • Forest is broken into patches (answer)
   • Forest is wetter
5. Two sources give different numbers for the eagle's population. What does that tell you?
   • The two numbers do not match (answer)
   • Every eagle was counted twice
   • Both numbers are exact

Words

• fragmentation: breaking into patches
• incubate: sit on eggs
• fledges: leaves the nest
• wingspan: wing width
• forage: search for food
• prey: hunted animals