Cambridge Science 4- Unit 1 Check your understandings

Write the word that describes each of the following:

a: A frame made of bone that supports our body.

• Skeleton

• Skull

• Rib Cage

• Legs

Write the word that describes each of the following:

b The bones of the head.

• Skeleton

• Skull

• Rib Cage

• Legs

Write the word that describes each of the following:

c Something that shows us how another thing looks or works.

• Skeleton

• Skull

• Model

• Frame

• Organs

Write the word that describes each of the following:

d The parts inside our bodies.

• Skeleton

• Skull

• Rib Cage

• Legs

• Organs

Write the word that describes each of the following:

e Animals with no backbone.

• Vertebrate

• Skull

• Rib Cage

• Legs

• invertebrate

Write the word that describes each of the following:

f. The parts of the body that allow our bones to move.

• Vertebrate

• Skull

• Muscles

• Legs

• invertebrate

Write the word that describes each of the following:

g The hard skin or shell on the outside of the body of some animals.

• Vertebrate

• Exoskeleton

• Muscles

• Legs

• invertebrate

Write the word that describes each of the following:

h An injection that prevents disease.

• Vertebrate

• Exoskeleton

• Muscles

• Vaccine

• invertebrate

Look at the drawing and answer the questions.

a: Write down the number of the muscle that gets

shorter to bend the arm.

Look at the drawing and answer the questions.

b: Choose the correct words in the sentences to explain how the muscle makes the arm bend upwards.

The muscle contracts/relaxes. The muscle gets longer/shorter and pushes / pulls on the arm bone.