Birds are classified as _____.
reptiles
vertebrates
insects
amphibians
What body part provides power for flight?
wing muscles
legs
eyes
feathers
Pelicans use their beaks to _____.
drink nectar
crack nuts
dig holes
scoop water and fish
Hummingbirds have long narrow beaks to _____.
catch fish
drink nectar
crack seeds
cut meat
Which feature of Archaeopteryx is similar to dinosaurs?
teeth
feathers
hollow bones
wings
Feathers help birds to _____.
hear sounds
steer and lift
breathe
smell food
Birds evolved from _____.
mammals
insects
fish
dinosaurs
Human arms and bird wings are similar because they _____.
have the same evolutionary origin
have feathers
are used for flying
look the same
Archaeopteryx had features of both _____.
mammals and reptiles
fish and birds
insects and birds
reptiles and birds
What type of beak does this bird have?
short think
hooked
long narrow
flst
What are bird wings adapted from?
forelimbs
fins
legs
tails
A high metabolic rate means birds can _____.
sleep a lot
grow slowly
produce energy quickly
eat less food
The bird’s tail helps it _____ in flight.
sleep
change direction
keep warm
eat food
Birds that eat seeds usually have _____ beaks.
curved sharp
flat wide
long thin
short thick
Look at the bird. What type of beak is this?
flat
spear
long narrow
short thick
What food does this beak eat?
seeds
nectar
fish
insects
How many digits does a bird wing have?
four
two
five
three
Wings are curved on top to create _____.
lift
sound
speed
heat
Look at the fossil. What early bird is this?
Archaeopteryx
Duck
Seagull
Eagle
Birds have streamlined bodies to reduce _____.
body weight
body heat
air resistance
gravity
Which bone is in both bird wings and human arms?
skull
rib
jaw
humerus
Birds have large breastbones to _____.
anchor wing muscles
store fat
protect the heart
hold food
Why do many bird bones have hollow spaces?
hold water
reduce weight
store food
grow faster
What shape helps birds fly easily?
streamlined
round
square
flat
A seagull’s skeleton is about _____ of its body weight.
20%
10%
15%
5%
Ducks have _____ beaks.
long sharp
short curved
broad flat
thin pointed