Cambridge Int Science - Stage 4 - Unit 1 - Animal Skeletons

The human body has a skeleton.

Look at the diagram of the skeleton.

Complete the labels for the bones of the skeleton.

a

b

c

d

Arm

Jaw

Hip

Skull

Explain why humans are vertebrates.

Humans are vertebrates because they have a ​ (a)   . ​

• backbone
• skull
• leg bones
• hip

Moving and exercising are important for maintaining human health.

Which one of these things is a benefit of exercising?

• Makes you gain weight

• Makes your heart stronger

• Makes your lungs weaker

• Makes you see and hear better

Dengue fever is an infectious disease spread by mosquitos.

Mosquitos usually live in habitats where there is water and plants.

Describe how they are able to move and feed away from their habitat.

Mosquitos move by?

• Flying

• Walking

• Running

• Jumping

Dengue fever is an infectious disease spread by mosquitos.

Mosquitos usually live in habitats where there is water and plants.

Describe how they are able to move and feed away from their habitat.

Mosquitos feed by?

• Taking blood from the body

• Licking the skin

• Chewing on their skin

Dengue fever cannot be prevented.

What is used to prevent some kinds of infectious disease? Select one answer.

• Food

• Painkiller

• Skin cream

• Vaccination

Describe how the muscles move the bones.

When the arm bends, the bicep ​ (a)   and ​ (b)   on the bone. At the same time, The tricep ​ (c)   . This causes the arm to bend.

• contracts
• pulls
• relaxes

Which of the following animals are vertebrates?

• 
• 
• 
• 
• 

Which of the following animals are invertebrates?

• 
• 
• 
• 
• 

Some animals have a skeleton on the outside of their body.

What is the name of this skeleton?

The skeleton on the outside of their body is called an ​ (a)   .

• exoskeleton
• vertebrate
• herbivore
• omnivore