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