WorksheetsTopic 3 Structures & Functions
Total questions: 25
Worksheet time: 13mins
What is the term for something that causes animals to react to their environment?
behavior
stimulus
respond
movement
Which word means how an animal acts after receiving a signal from its brain?
respond
behavior
stimulus
organ
Which organ pumps blood through the body?
brain
heart
lungs
skeleton
Which organ gives the body shape and helps with movement?
lungs
skeleton
heart
brain
Which organ receives and interprets messages?
heart
lungs
brain
skeleton
Which organ breathes in oxygen and exhales carbon dioxide?
lungs
heart
skeleton
brain
If an animal hears a loud sound and quickly turns its head, which organ is helping it respond?
lungs
skeleton
brain
heart
Why is the skeleton important for movement?
It pumps blood.
It helps the body breathe.
It gives shape and helps with movement.
It receives messages.
If a person is running and needs more oxygen, which organ works harder?
brain
lungs
skeleton
heart
What is the function of the flower structure shown in the picture?
To make food
To attract pollinators
To protect roots
To store water
What do fish use to breathe since they do not have lungs?
veins
fins
gills
stomata
Which of the following is an internal structure of a plant?
Xylem
Stem
Ovary
Stamen
Which of the following is an external structure of a plant?
Xylem
Roots
Ovary
Stamen
Which two ways do thorns and bark help a plant?
They store seeds until they are ready to be scattered.
They stop predators from eating the plant.
They protect the plant from harmful materials.
They take in and store water to be used later.
If you are making a poster about plant structures, which structure would you place under "Internal Structures"?
Flowers
Roots
Xylem
Stem
Why is it important for a plant to have bark?
To make food for the plant
To protect the plant from harmful materials
To store seeds
To help the plant grow taller
Which three organisms have bones in a rigid support system?
Dog, person, horse
Dog, bee, horse
Dog, person, bee
Bee, person, horse
A student is studying how animals that are not vertebrates protect their bodies. What is the hard external covering called?
Exoskeleton
Skeleton
Fur
Shell
What feature helps the animal in the picture survive its watery environment?
Waterproof
Furry
Slimy
Scaly
How does the hard external covering help protect the animal’s internal structures?
By protecting them
By freezing them
By hiding them
By moving them
Which function best completes the chart for fish with scales?
help animal breathe
protect animal from enemies
help animal find food
prevent animal from laying eggs
An organism ____________ to make others like itself.
reproduces
eats
grows
moves
What do plant leaves have to keep unwanted water from entering the plant?
stem
root
cuticle
flower
Some animals rely on waterproof ____________ to keep unwanted water away.
hair
exoskeletons
feathers
scales
Which picture best shows what happens when an animal species goes extinct?
The picture with two lions under a tree
The picture with one lion under a tree
The picture with no lions under a tree
The picture with a lion lying down under a tree
