Birds are classified as _____.
reptiles
amphibians
insects
vertebrates
Birds evolved from _____.
mammals
fish
insects
dinosaurs
Archaeopteryx had features of both _____.
mammals and reptiles
reptiles and birds
fish and birds
insects and birds
Which feature of Archaeopteryx is similar to dinosaurs?
feathers
wings
teeth
hollow bones
Why do many bird bones have hollow spaces?
grow faster
hold water
reduce weight
store food
A seagull’s skeleton is about _____ of its body weight.
5%
20%
10%
15%
Birds have large breastbones to _____.
protect the heart
anchor wing muscles
hold food
store fat
Wings are curved on top to create _____.
sound
heat
speed
lift
Feathers help birds to _____.
smell food
steer and lift
breathe
hear sounds
Birds have streamlined bodies to reduce _____.
body heat
air resistance
body weight
gravity
A high metabolic rate means birds can _____.
produce energy quickly
eat less food
sleep a lot
grow slowly
The bird’s tail helps it _____ in flight.
eat food
change direction
sleep
keep warm
Human arms and bird wings are similar because they _____.
are used for flying
look the same
have the same evolutionary origin
have feathers
How many digits does a bird wing have?
four
five
two
three
Birds that eat seeds usually have _____ beaks.
flat wide
short thick
curved sharp
long thin
Hummingbirds have long narrow beaks to _____.
catch fish
cut meat
drink nectar
crack seeds
