Ears in the Dark: teacher key

Red Foxes, grade 8 edition, written for 8th grade. A red fox hunts at night mostly by ear. Read how well it hears, how a kit begins and how long a fox lives.

Read the book. Print this page for the key.

Questions and answers

1. What must a red fox mainly rely on to find food?
   • Swimming
   • Hearing (answer)
   • Its fur color
2. What range of sounds did red foxes hear in the lab test?
   • 1 Hz to 2 Hz
   • Only high squeaks
   • 51 Hz to 48 kHz (answer)
3. What does nursed mean here?
   • Left the den
   • Hid in a den
   • Drank mother's milk (answer)
4. How many wild red foxes survive more than 4 to 6 years?
   • Few of them (answer)
   • Most of them
   • All of them
5. Why do red foxes turn their ears?
   • To keep warm
   • To find where a sound comes from (answer)
   • To mark scent

Words

• hertz: waves per second
• octaves: pitch doublings
• nursed: fed mother's milk
• dusk: evening time