Threats
Before what year (estimate) was overhunting a big threat?
1970s
WHERE AND WHEN do Pregnant females hibernate
Dens/caves and Fall
Favorite food
Seals
Black, keeps them warm
Scientists also refer to bears as ______
Sea Bear
Why were they overhunted?
For fur
When do polar bears move inland and eat whatever they can find
Summer
Amount of cubs they have, what they usually are
2 to 3, usually twins
The best senses of bears are _______ and ___________.
vision and smell
Their feet are _________ to help them swim
webbed
How to help
- Use less energy
- donate
- advocate by writing letters
When do females and males find each other
Spring
Amount of Polar Bears alive (estimate)
20,000 to 30,000
Shape of bodies and head
elongated
Feasting on seals lets polar bears do what
Add a thick layer of blubber for the year
What is released because of human activities that cause global warming? This _________ the habitat of polar bears.
Carbon dioxide
melts/destroys
When do females have cubs
Winter
They live in (5X)
Russia, norway, greenland, canada and alaska
Small bumps, long hairs which causes friction and gives traction
Bears can swim ____ miles without stopping
60
Name Industrial impacts
- Accidental oil spills
- Summer sea ice retreat makes the ocean more navigable.
When do females build dens
Fall
How long do cubs usually stay with mother
2 years
Aspects/purpose of Outer Layer (3x)
Long Hairs, reflect light, camouflage
Aspects/Purpose of INNER layer (3x)
Short hairs, wooly, meant for insulation