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Bird Characteristics
More about Birds
What is a Mammal?
Mammal Adaptations
Kinds of Mammals
100
Describe Birds (5 things)
endothermic vertebrates feathers 4-chambered heart lays eggs
100
Why are birds important?
They help flowers to reproduce, they eat pest animals, and provide resources for people
100
Are mammals endothermic or exothermic?
endothermic
100
How big were the earliest mammals? When did they grow larger?
The Earliest mammals were mouse-sized. They grew larger after dinosaurs became extinct.
100
Where is the milk produced from in a mammal?
the mammary glands
200
What are the large feathers that give shape to a bird's body?
contour feathers
200
What two directions must birds move to fly?
up and forward
200
How many chambers does a mammal heart have?
4
200
Why do animals have fur, fat, and hair?
to help maintain a stable body temperature
200
What are the three types of mammals?
monotremes, marsupials, and placental mammals
300
What type of animals are birds descended from?
reptiles
300
What are two adaptations to birds have for flight?
four chambered heart for sending oxygen rich blood to cells, strong chest muscles, wings
300
all mammals have skin that is covered in
fur or hair
300
What are the sharp pointed teeth of mammals called?
Canines
300
What is gestation period? How does the gestation period of small mammals compare to that of larger mammals?
the length of time between fertilization and birth smaller mammals have shorter gestation periods
400
What is an insulator and what do birds have that perform this function?
A material that does not conduct heat and prevents it from escaping. Birds have down feathers that are insulators
400
Other than flapping, name two bird motions for flying
soaring and gliding
400
The young of most mammals are born_____
alive
400
What are the flat edged teeth used for biting and cutting parts of food?
incisors
400
How are mammals primarily classified?
by how their young develop
500
What are the functions of the "crop" and the "gizzard"?
The crop is an internal storage tank that lets birds store food after swallowing it. The gizzard is part of the stomach that squeezes and grinds food.
500
How do birds fly? Explain how pressure differences create lift
Air moves over the tops of the birds wings faster. Where air is moving faster, there is less pressure. Below the birds wing, there is higher pressure because the air is not moving as fast. This difference in pressure creates lift
500
Every young mammal is fed with what?
Milk produced by the mother's mammary glands
500
What kinds of teeth are used for grinding and shredding food?
Molars and premolars
500
describe how the young of each three type of mammal develops
monotreme = egg marsupial = pouch placental = develop inside their mothers until its body systems can function on their own