WorksheetsGrade 4 - U2L2 - Science Worksheet
Total questions: 27
Worksheet time: 14mins
The glass frog's translucent skin is an example of an external structure. What is its most likely function?
To help it digest food faster.
To help it attract a mate with bright colors.
To provide camouflage from predators in the rainforest.
To help it swim faster in water.
A scientist observes an animal with sharp, pointed teeth and powerful jaws. What can she most likely infer about this animal's diet?
It is a herbivore that eats plants and grass.
It is a carnivore that eats other animals.
It is an omnivore that eats both plants and animals.
It gets nutrients from organisms living inside it.
Which of the following best describes the relationship between internal structures like the heart and lungs?
They are part of different, unrelated systems.
They work together as parts of body systems to help an animal survive.
They are only found in mammals.
They are external structures.
A male peacock spider performs a complex dance for a female. This behavior is called a courtship display. What is its primary purpose?
To scare away predators.
To find a source of food.
To increase its chance of reproduction.
To mark its territory.
How is a shark's digestive system DIFFERENT from a cow's?
The shark's system breaks down food.
The shark has a multi-chambered stomach for chewing grass.
The shark has a spiral-shaped intestine to break down food it may swallow whole.
The shark does not have a stomach.
What is the main function of a polar bear's thick, hollow fur?
To help it swim faster.
To attract a mate.
To trap heat and keep it warm.
To help it digest food.
An ant uses its three pairs of legs to move quickly. A frog uses its two strong hind legs to jump. What does this show about animal structures?
All animals have the same structures for movement.
Different animals can have different structures for the same function (movement).
Structures for movement are not important for survival.
Frogs are better at moving than ants.
Which animal pair BEST demonstrates how internal structures for reproduction can be different?
A mountain lion and an antelope.
A bird that lays eggs and a deer that gives birth to live young.
A shark and a dolphin.
An eagle and a mosquito.
Looking at the internal structures of a dog, which system is responsible for breaking down food into nutrients?
The Circulatory System
The Respiratory System
The Digestive System
The Skeletal System
Why don't jellyfish need a circulatory or respiratory system like a dog does?
They are not real animals.
They are much smaller than dogs.
They exchange gases and process food directly through their skin.
They live on land instead of in water.
Label the diagram of the shark's digestive system below.
1. Mouth, 2. Esophagus, 3. Stomach, 4. Liver, 5. Intestines
1. Mouth, 2. Liver, 3. Stomach, 4. Esophagus, 5. Intestines
1. Esophagus, 2. Mouth, 3. Liver, 4. Stomach, 5. Intestines
1. Stomach, 2. Mouth, 3. Esophagus, 4. Liver, 5. Intestines
A porcupine has sharp spines on its skin. Since the spines are on the outside, they are an ________________________ structure.
external
internal
chemical
digestive
The heart and lungs are examples of ________________________ structures because they are on the inside of the body.
internal
external
surface
outer
The job that a body part does is called its ________________________. For example, the ________________________ of a wing is to enable flight.
function, function
structure, movement
purpose, action
shape, use
When a male bird shows off its bright feathers to attract a female, it is performing a behavior known as ________________________.
courtship displays
migration
nest building
territorial defense
A chicken has a part called a ________________________, which acts like a second stomach to help grind up food.
gizzard
crop
cloaca
wattle
The process of animals making more of their own kind is called ________________________.
reproduction
respiration
digestion
migration
The circulatory system and digestive system are both examples of body ________________________, where different parts work together for a common purpose.
systems
organs
cells
fluids
The glass frog's see-through skin is an external structure that helps it hide.
True
False
All animals have the same kind of mouth parts for eating.
True
False
A polar bear's thick fur helps it stay warm in its cold environment.
True
False
An animal's heart and lungs are examples of internal structures.
True
False
The main purpose of a courtship display, like a peacock spider's dance, is to find food.
True
False
Animals like corals and sponges move around a lot to find their food.
True
False
Birds, fish, and reptiles all reproduce by giving birth to live young.
True
False
A shark's spiral-shaped intestine is a special internal structure that helps it digest food.
True
False
The function of a frog's strong hind legs is to help it jump.
True
False
